Hybrid loader boom arm assembly

ABSTRACT

A hybrid loader boom arm assembly for a loader work vehicle includes an arm assembly. The arm assembly includes a hollow first beam formed from a lightweight material and a block formed from a second lightweight material. The block has a first block end received within a first end of the first beam. The arm assembly includes at least one first steel reinforcing plate coupled to the first beam at the end, and at least one connecting plate coupled to the at least one first reinforcing plate.

CROSS-REFERENCE TO RELATED APPLICATION(S)

Not applicable.

STATEMENT OF FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not applicable.

FIELD OF THE DISCLOSURE

This disclosure relates to work vehicles, such as loaders, and boom armassemblies that are configured to attach a work implement, such as abucket, to the work vehicles to carry material.

BACKGROUND OF THE DISCLOSURE

In the agriculture, construction and forestry industries, various workmachines, such as loaders, may be utilized in lifting and moving variousmaterials. In certain examples, a loader may include a bucket pivotallycoupled by a loader boom arms to the vehicle chassis. One or morehydraulic cylinders move the loader boom arms and/or the bucket to movethe bucket between positions relative to the chassis to lift and movematerials.

Various factors are considered when designing or selecting the loaderboom arms and bucket arrangement used, for example, the durability andwear resistance of the loader boom arms, and the weight of material theloader boom arms can lift. These factors typically indicate that theloader boom arms be made of heavy steel plate construction to handlelarge volumes of material and the corresponding weight and other forcesassociated with loading and carrying the heavy material. This alsorequires a robust hydraulic system with correspondingly large-capacitypumps, accumulators, valves and cylinders. Further, wear or damage tothe loader boom arms may also require replacement or vehicle downtime torepair the heavy-duty components.

SUMMARY OF THE DISCLOSURE

The disclosure provides a hybrid loader boom arm assembly in which anarm assembly and a second arm assembly formed of a lightweight materialare interconnected by a torque transfer tube formed of a lightweightmaterial.

In one aspect, the disclosure provides a hybrid loader boom arm assemblyfor a loader work vehicle. The loader boom arm includes an arm assembly,which includes a hollow first beam formed from a lightweight materialand a block formed from a second lightweight material. The block has afirst block end received within a first end of the first beam. The armassembly includes at least one first steel reinforcing plate coupled tothe first beam at the end, and at least one connecting plate coupled tothe at least one first reinforcing plate.

In another aspect, the present disclosure provides a hybrid loader boomarm assembly for a loader work vehicle. The loader boom arm includes anarm assembly, which includes a hollow first beam formed from alightweight material and a hollow second beam formed from thelightweight material. The arm assembly includes a block formed from asecond lightweight material. The block has a first block end receivedwithin a first end of the first beam and a second block end receivedwithin a second end of the second beam. The block is configured tocouple the first beam to the second beam. The arm assembly includes atleast one first steel reinforcing plate coupled to the first beam at theend, and at least one second steel reinforcing plate coupled to thesecond beam at the second end. The arm assembly includes at least oneconnecting plate coupled to the at least one first reinforcing plate andthe at least one second reinforcing plate.

The details of one or more embodiments are set forth in the accompanyingdrawings and the description below. Other features and advantages willbecome apparent from the description, the drawings, and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of an example work vehicle in the form ofan agricultural loader in which the disclosed hybrid loader boom armassembly may be used;

FIG. 1A is a perspective view of an example work vehicle in the form ofa compact utility tractor in which the disclosed hybrid loader boom armassembly may be used;

FIG. 2 is a side view of an example hybrid loader boom arm assemblycoupled to a bucket as shown in FIG. 1;

FIG. 3 is a perspective view of the hybrid loader boom arm assembly ofFIG. 2;

FIG. 4 is an exploded view of a first beam of one of the arm assembliesof the hybrid loader boom arm assembly of FIG. 3;

FIG. 5 is a partially exploded view of the hybrid loader boom armassembly of FIG. 3;

FIG. 6 is a detail view of a vehicle mounting subassembly coupled to thefirst beam of one of the arm assemblies of the hybrid loader boom armassembly of FIG. 3;

FIG. 7 is an exploded view of the vehicle mounting subassembly of FIG.6;

FIG. 8 is a cross-sectional view of the vehicle mounting subassembly,taken along line 8-8 of FIG. 6;

FIG. 9 is a detail view of a bucket mount bracket subassembly coupled toa second beam of an arm assembly of the hybrid loader boom arm assemblyof FIG. 3;

FIG. 10 is an exploded view of the bucket mount bracket subassembly ofFIG. 9;

FIG. 11 is a cross-sectional view of the bucket mount bracketsubassembly, taken along line 11-11 of FIG. 9;

FIG. 12 is a cross-sectional view of the bucket mount bracketsubassembly, taken along line 12-12 of FIG. 9;

FIG. 13 is a detail view of a knee mounting subassembly of the hybridloader boom arm assembly of FIG. 3;

FIG. 14 is an exploded view of the knee mounting subassembly of FIG. 13;

FIG. 11 is a cross-sectional view of the bucket mount bracketsubassembly, taken along line 11-11 of FIG. 9;

FIG. 15 is a cross-sectional view of one arm assembly of the hybridloader boom arm assembly, taken along line 15-15 of FIG. 3;

FIG. 16 is a cross-sectional view of a torque transfer tube connected tothe arm assembly and a second arm assembly of the hybrid loader boom armassembly, taken along line 16-16 of FIG. 3;

FIG. 17 is a perspective view of an end of the torque transfer tube ofthe hybrid loader boom arm assembly of FIG. 3;

FIG. 18 is an exploded view of the end of the torque transfer tube ofthe hybrid loader boom arm assembly of FIG. 17;

FIG. 19 is a detail cross-sectional view of the end of the torquetransfer tube connected to the arm assembly of the hybrid loader boomarm assembly, taken at 19 of FIG. 16;

FIG. 20 is a perspective view of another hybrid loader boom arm assemblyfor use with the work vehicle of FIG. 1 or FIG. 1A;

FIG. 21 is an exploded view of a first beam of one of the arm assembliesof the hybrid loader boom arm assembly of FIG. 20;

FIG. 22 is a cross-sectional view of the first beam of the one of thearm assemblies of the hybrid loader boom arm assembly of FIG. 20, takenalong line 22-22 of FIG. 20;

FIG. 23 is a partially exploded view of the hybrid loader boom armassembly of FIG. 20;

FIG. 24 is a detail view of a vehicle mounting subassembly coupled tothe first beam of one of the arm assemblies of the hybrid loader boomarm assembly of FIG. 20;

FIG. 25 is an exploded view of the vehicle mounting subassembly of FIG.24;

FIG. 26 is a cross-sectional view of the vehicle mounting subassembly,taken along line 26-26 of FIG. 24;

FIG. 27 is a detail view of a bucket mount bracket subassembly of thehybrid loader boom arm assembly of FIG. 20;

FIG. 28 is an exploded view of the bucket mount bracket subassembly ofFIG. 27;

FIG. 29 is a cross-sectional view of the bucket mount bracketsubassembly, taken along line 29-29 of FIG. 27;

FIG. 30 is a cross-sectional view of the bucket mount bracketsubassembly, taken along line 30-30 of FIG. 27;

FIG. 31 is a detail view of a knee mounting subassembly of the hybridloader boom arm assembly of FIG. 20;

FIG. 32 is an exploded view of the knee mounting subassembly of FIG. 31;

FIG. 33 is a cross-sectional view of a torque transfer tube connected tothe arm assembly and a second arm assembly of the hybrid loader boom armassembly, taken along line 33-33 of FIG. 20;

FIG. 34 is a detail cross-sectional view of the end of the torquetransfer tube connected to the arm assembly of the hybrid loader boomarm assembly, taken at 34 of FIG. 20;

FIG. 35 is a cross-sectional view of one arm assembly of the hybridloader boom arm assembly, taken along line 35-35 of FIG. 20;

FIG. 36 is a perspective view of another hybrid loader boom arm assemblyfor use with the work vehicle of FIG. 1 or FIG. 1A;

FIG. 37 is a partially exploded view of the hybrid loader boom armassembly of FIG. 36;

FIG. 38 is a cross-sectional view of the first beam of the one of thearm assemblies of the hybrid loader boom arm assembly of FIG. 36, takenalong line 38-38 of FIG. 36;

FIG. 39 is a cross-sectional view of the vehicle mounting subassembly,taken along line 39-39 of FIG. 36;

FIG. 40 is a cross-sectional view of one arm assembly of the hybridloader boom arm assembly, taken along line 40-40 of FIG. 36;

FIG. 41 is a perspective view of an example block having at least onerib for use with one of the hybrid loader boom arm assemblies of FIG. 1,20 or 36 in accordance with various embodiments;

FIG. 42 is a cross-sectional schematic view that illustrates the blockof FIG. 41 positioned within a first beam of one of the hybrid loaderboom arm assemblies of FIG. 1, 20 or 36 in accordance with variousembodiments;

FIG. 43 is a partially exploded cross-sectional schematic view thatillustrates an insert for use with coupling a block to one of the firstbeams of the hybrid loader boom arm assemblies of FIG. 1, 20 or 36 inaccordance with various embodiments;

FIG. 44 is a cross-sectional schematic view that illustrates the blockcoupled to the first beam with an adhesive that is retained by theinsert;

FIG. 45 is a partially exploded cross-sectional schematic view thatillustrates an energy activated foam for use with coupling a block toone of the first beams of the hybrid loader boom arm assemblies of FIG.1, 20 or 36 in accordance with various embodiments;

FIG. 46 is a cross-sectional schematic view that illustrates the energyactivated foam of FIG. 45 in an activated state to couple the block tothe first beam; and

FIG. 47 is a cross-sectional schematic view of an example cross-sectionfor one of the first beams and/or the second beams of the hybrid loaderboom arm assemblies of FIG. 1, 20 or 36, and an example cross-sectionfor one of the blocks of the hybrid loader boom arm assemblies of FIG.1, 20 or 36.

Like reference symbols in the various drawings indicate like elements.

DETAILED DESCRIPTION

The following describes one or more example embodiments of the disclosedhybrid loader boom arm assembly, as shown in the accompanying figures ofthe drawings described briefly above. Various modifications to theexample embodiments may be contemplated by one of skill in the art.

As used herein, unless otherwise limited or modified, lists withelements that are separated by conjunctive terms (e.g., “and”) and thatare also preceded by the phrase “one or more of” or “at least one of”indicate configurations or arrangements that potentially includeindividual elements of the list, or any combination thereof. Forexample, “at least one of A, B, and C” or “one or more of A, B, and C”indicates the possibilities of only A, only B, only C, or anycombination of two or more of A, B, and C (e.g., A and B; B and C; A andC; or A, B, and C).

Conventional loader boom arms for use in various construction andagricultural applications to couple a work implement to a work vehiclefor hauling materials (e.g., dirt, sand, aggregate and so on) aretypically cast or fabricated of heavy-duty construction usinghigh-strength materials (e.g., steel). The heavy-duty constructionaffords conventional loader boom arms the ability to undergo extremelifting and treatment during use. In addition to the material itself,the weight of the heavy-duty loader boom arms must be accommodated bythe host machine, and specifically by its hydraulic system, to ensurethat the machine performs as expected, that is will raise and lower theloader boom arms at the rate and range of motion desired. Further, asheavy and rugged as they are, encountering sufficient loading, abrasionor other forces can cause damage to conventional loader boom arms. Theloader boom arms may yield (i.e., crack) due to impact or stressconcentrations, or they may experience wear that may impact theperformance of the machine. Damage or worn loader boom arms may need tobe replaced or repaired at significant expense or operational downtimeof the machine.

This disclosure provides an alternative to the conventional loader boomarms through the use of a hybrid loader boom arm assembly that isconfigured to couple to the work vehicle and the bucket. The disclosedhybrid loader boom arm assembly has a light-duty construction, and iscomposed of generally lightweight materials. For example, the disclosedhybrid loader boom arm assembly (“HLBAA”) may have arm assembliescomposed of a first beam, a second beam and a torque transfer tube, eachof which is composed of a lightweight material. As used herein“lightweight material” generally denotes a material that has a weightthat is less than a weight of steel, such that an arm assembly of theHLBAA has a weight that is less than a weight of a conventional steelarm assembly. Exemplary lightweight materials include, but are notlimited to, aluminum, polymer-based material, glass-fiber reinforcedpolymer-based materials, carbon-fiber reinforced polymer-basedmaterials, G10 material, and the like. In certain embodiments, internalfibrous reinforcements may be employed to enable the polymer-basedmaterial, glass-fiber reinforced polymer-based materials andcarbon-fiber reinforced polymer-based materials to sustain the loadingand twisting experienced during the operation of the loader. Theinternal fibrous reinforcements may be randomly oriented or may beoriented in the direction of loading. The internal fibrousreinforcements include, but are not limited to, glass, basalt, carbon,aramids, olefins, and cellulose-based materials. The HLBAA generally hasa weight that is about 10% to about 20% lighter than conventional steelloader boom arms. This reduces fuel consumption, and may enable the useof a light-duty hydraulic system. In this way, the disclosed HLBAA mayhave both lightweight and low-cost attributes.

In addition, the first beam, the second beam and the torque transfertube that make up the HBLAA may be coupled together using variousjoining techniques, including the use of an adhesive and adhesive bonds.The adhesive used with the HBLAA may include, but is not limited to, apolyurethane-based adhesive, epoxy, etc. Generally, the lightweightconstruction of the HBLAA enables the HBLAA to be packaged in regularpackaging, and transported in a disassembled state, which reducesshipping and transportation costs. The HBLAA may be assembled at thecustomer's location or other location remote from the manufacturingfacility, which increases a volume of HBLAA that may be transported in atransportation vehicle, for example. The HBLAA may be shipped as a kitand bonded at the customer's location, or assembled in the factory andshipped to the customer. As used herein, the adhesives to form theadhesive bond of the HBLAA cure at room temperature and do not requirespecial equipment to cure or assemble, which enables a customer, remotefrom the factory, to assemble the HBLAA. Moreover, the adhesive bondsare formed by adhesives that will break apart when exposed to a specificenergy source, such as through inductive heating. This enables thecustomer to disassemble the HBLAA for repair or replacement of a damagedcomponent. Further, in certain instances, the customer may be providedwith a structural reinforcing patch, which the customer may adhesivelybond or fasten to the damaged area to repair the HBLAA, withoutrequiring disassembly of the HBLAA.

The following describes one or more example implementations of thedisclosed HLBAA. The HLBAA may be utilized with various machines or workvehicles, including loaders and other machines for lifting and movingvarious materials in the agricultural and construction industries.Referring to FIGS. 1 and 2, in some embodiments, the HLBAA may be usedwith an agricultural loader 10. It will be understood that theconfiguration of the loader 10 is presented as an example only. In thisregard, the disclosed HLBAA may be implemented as a front loaderremovably coupled to a work vehicle, such as a tractor. Other workvehicles, such as dedicated wheel loaders used in the constructionindustry, may benefit from the disclosed HLBAA as well. Further, theHLBAA may be used with a skid-steer or other work vehicles that employone or more boom arms to couple work implements to the work vehicle.

Generally, the loader 10 includes a source of propulsion, such as anengine 12 that supplies power to a transmission 14. In one example, theengine 12 is an internal combustion engine, such as a diesel engine,that is controlled by an engine control module. The transmission 14transfers power from the engine 12 to a suitable driveline coupled toone or more driven wheels 16 of the loader 10 to enable the loader 10 tomove. The engine 12, the transmission 14 and the rest of the drivelineare supported by a vehicle chassis 18, which is supported off the groundby the wheels 16. As is known to one skilled in the art, thetransmission 14 can include a suitable gear transmission, which can beoperated in a variety of ranges containing one or more gears, including,but not limited to a park range, a neutral range, a reverse range, adrive range, a low range, a high range, etc. The transmission 14 may becontrolled by a transmission control module, which is, along with theengine control module, in communication with a master controller 22 (orgroup of controllers).

The controller 22 may control various aspects of the operation of theloader 10 and may be configured as a computing device with associatedprocessor devices and memory architectures, as a hard-wired computingcircuit (or circuits), as a programmable circuit, as a hydraulic,electrical or electro-hydraulic controller, or otherwise. As such, thecontroller 22 may be configured to execute various computational andcontrol functionality with respect to the loader 10 (or othermachinery). In some embodiments, the controller 22 may be configured toreceive input signals in various formats (e.g., as hydraulic signals,voltage signals, current signals, and so on), and to output commandsignals in various formats (e.g., as hydraulic signals, voltage signals,current signals, mechanical movements, and so on). In some embodiments,the controller 22 (or a portion thereof) may be configured as anassembly of hydraulic components (e.g., valves, flow lines, pistons andcylinders, and so on), such that control of various devices (e.g., pumpsor motors) may be effected with, and based upon, hydraulic, mechanical,or other signals and movements.

The controller 22 may be in electronic, hydraulic, mechanical, or othercommunication with various other systems or devices of the loader 10 (orother machinery). For example, the controller 22 may be in electronic orhydraulic communication with various actuators, sensors, and otherdevices within (or outside of) the loader 10, including various devicesassociated with a hydraulic system. The controller 22 may communicatewith other systems or devices (including other controllers) in variousknown ways, including via a CAN bus (not shown) of the loader 10, viawireless or hydraulic communication means, or otherwise. An examplelocation for the controller 22 is depicted in FIG. 1. It will beunderstood, however, that other locations are possible including otherlocations on the loader 10, or various remote locations. In someembodiments, the controller 22 may be configured to receive inputcommands and to interface with an operator via a human-machine interface26, which may be disposed inside a cab 28 of the loader 10 for easyaccess by the operator. The human-machine interface 26 may be configuredin a variety of ways and may include one or more joysticks, variousswitches or levers, one or more buttons, a touchscreen interface thatmay be overlaid on a display, a keyboard, a speaker, a microphoneassociated with a speech recognition system, or various otherhuman-machine interface devices.

The loader 10 also has a hydraulic system that includes one or morepumps and accumulators (designated generally by reference number 30),which may be driven by the engine 12 of the loader 10. Flow from thepumps 30 may be routed through various control valves and variousconduits (e.g., flexible hoses) to drive various hydraulic cylinders,such as hydraulic cylinders 34, 36, 38, shown in FIG. 1. Flow from thepumps (and accumulators) 30 may also power various other components ofthe loader 10. The flow from the pumps 30 may be controlled in variousways (e.g., through control of various electro-hydraulic control valves40) to cause movement of the hydraulic cylinders 34, 36, 38, and thus, aHLBAA 50 relative to the loader 10. In this way, for example, movementof the HLBAA 50 between various positions relative to the chassis 18 ofthe loader 10 may be implemented by various control signals to the pumps30, control valves 40, and so on.

In the embodiment depicted, a bucket 52 is pivotally mounted to theHLBAA 50. The bucket 52 may comprise a conventional steel bucket, or maycomprise a hybrid loader bucket assembly. As will be discussed ingreater detail herein, the HLBAA 50 includes a first or arm assembly 62and a second arm assembly 64, which are interconnected via a hollowtorque transfer tube 66 to operate in parallel. The arm assemblies 62,64 are each coupled to the chassis 18, directly or via another frameportion of the loader 10, at one end, and are coupled at an opposite endto the bucket 52 via a carrier 68, which is pivoted via first and second(left and right) pivot linkages 70, 72. In the illustrated example, thecarrier 68 comprises first and second (left and right) couplers 74, 76,connected by a cross-rod 78, that mount to the distal ends of therespective arm assemblies 62, 64 via coupling pins 80. Additional pinspivotally couple the pivot linkages 70, 72 between the arm assemblies62, 64 and the respective first and second couplers 74, 76. The pivotlinkages 70, 72 enable pivotal movement of the bucket 52 upon actuationof the hydraulic cylinders 36, 38.

The hydraulic cylinders may be actuated to raise and lower the HLBAA 50relative to the loader 10. In the illustrated example, the HLBAA 50includes two hydraulic cylinders, namely the hydraulic cylinder 34coupled between the chassis 18 and the arm assembly 62 and acorresponding cylinder on the opposite side of the loader (not shown)coupled between the chassis 18 and the second arm assembly 64. It shouldbe noted that the loader 10 may have any number of hydraulic cylinders,such as one, three, etc. Each of the hydraulic cylinders 34 includes anend coupled to the chassis 18 (e.g., via a coupling pin) and an endmounted to the respective one of the arm assembly 62 and the second armassembly 64 (e.g., via another pin). Upon activation of the hydrauliccylinders 34, the HLBAA 50 may be moved between various positions toelevate the HLBAA 50, and thus the bucket 52, relative to the chassis 18of the loader 10.

One or more hydraulic cylinders 36 are mounted to the arm assembly 62and the first pivot linkage 70, and one or more hydraulic cylinders 38are mounted to the second arm assembly 64 and the second pivot linkage72. In the illustrated example, the loader 10 includes a singlehydraulic cylinder 36, 38 associated with a respective one of the armassembly 62 and the second arm assembly 64, respectively. Each of thehydraulic cylinders 36, 38 includes an end mounted to the respective oneof the arm assembly 62 and the second arm assembly 64 (via another pin)and an end mounted to the respective one of the first pivot linkage 70and the second pivot linkage 72 (via another pin). Upon activation ofthe hydraulic cylinders 36, 38, the bucket 52 may be moved betweenvarious positions, namely to pivot the carrier 68, and thereby thebucket 52, relative to the HLBAA 50.

Thus, in the embodiment depicted, the bucket 52 is pivotable about thecarrier 68 of the HLBAA 50 by the hydraulic cylinders 36, 38. As noted,in some embodiments, a different number or configuration of hydrauliccylinders or other actuators may be used. Thus, it will be understoodthat the configuration of the hydraulic system and the HLBAA 50 ispresented as an example only. In this regard, in other contexts, a hoistboom (e.g. the HLBAA 50) may be generally viewed as a boom that ispivotally attached to a vehicle frame, and that is also pivotallyattached to an end effector (e.g., the bucket 52). Similarly, thecarrier 68 (e.g., the couplers 74, 76) may be generally viewed as acomponent effecting pivotal attachment of a bucket (e.g. the bucket 52)to a vehicle frame. In this light, a tilt actuator (e.g., the hydrauliccylinders 36, 38) may be generally viewed as an actuator for pivoting areceptacle with respect to a hoist boom, and the hoist actuator (e.g.the hydraulic cylinders 34) may be generally viewed as an actuator forpivoting a hoist boom with respect to a vehicle frame.

In certain applications, sensors (e.g., pressure, flow or other sensors)may be provided to observe various conditions associated with the loader10. For example, the sensors may include one or more pressure sensorsthat observe a pressure within the hydraulic circuit, such as a pressureassociated with at least one of the pumps 30, the control valves 40and/or one or more hydraulic cylinders 34, 36, 38 to observe a pressurewithin the hydraulic cylinders and generate sensor signals basedthereon. In some cases, various sensors may be disposed on or near thecarrier 68 and/or the bucket 52. For example, sensors (e.g. inertialmeasurement sensors) may be coupled on or near the bucket 52 to observeor measure parameters including the acceleration of the HLBAA 50 and/orthe bucket 52 and generate sensor signals, which may indicate if theHLBAA 50 and/or the bucket 52 is accelerating or decelerating. In someembodiments, various sensors (e.g., angular position sensors) may beconfigured to detect the angular orientation of the bucket 52 relativeto the HLBAA 50, or to detect the angular orientation of the HLBAA 50relative to the chassis 18, and various other indicators of the currentorientation or position of the bucket 52. For example, rotary angularpositon sensors may be used or linear position or displacement sensorsmay be used to determine the length of the hydraulic cylinders 34, 36,38 relative to the HLBAA 50.

The bucket 52 generally defines a receptacle for carrying variousmaterials, such as dirt, rocks, wet dirt, sand, hay, etc. In oneexample, the bucket 52 may receive about two cubic yards of material toover about five cubic yards of material. The bucket 52 is movable uponactuation of the hydraulic cylinders 36, 38 between a level position, aroll-back position and a dump position, along with various positions inbetween. In the level position, the bucket 52 can receive variousmaterials. In the roll-back position, the bucket 52 is pivoted upwardrelative to the earth's surface or ground by the actuation of thehydraulic cylinders 36, 38 such that the bucket 52 may be loaded withand retain the various materials. In the dump position, the bucket 52 ispivoted downward relative to the earth's surface or ground by theactuation of the hydraulic cylinders 36, 38 such that the variousmaterials may fall from the bucket 52 to substantially empty the bucket52.

Referring to FIG. 1A, in some embodiments, the HLBAA 50 may be used witha compact utility tractor 1000 having a front loader 1002 removablycoupled to the compact utility tractor 1000. It will be understood thatthe implementation of the HLBAA 50 with the compact utility tractor 1000is presented as an example only. Generally, the compact utility tractor1000 includes a source of propulsion, such as an engine 1012 thatsupplies power to a transmission 1014. In one example, the engine 1012is an internal combustion engine, such as a diesel engine, that iscontrolled by an engine control module. The transmission 1014 transferspower from the engine 1012 to a suitable driveline coupled to one ormore driven wheels 1016 of the compact utility tractor 1000 to enablethe compact utility tractor 1000 to move. The engine 1012, thetransmission 1014 and the rest of the driveline are supported by avehicle chassis 1018, which is supported off the ground by the wheels1016. As is known to one skilled in the art, the transmission 1014 caninclude a suitable gear transmission, which can be operated in a varietyof ranges. The transmission 1014 may be controlled by a transmissioncontrol module, which is, along with the engine control module, incommunication with a master controller 1022 (or group of controllers).

The controller 1022 may control various aspects of the operation of thecompact utility tractor 1000 and may be configured as a computing devicewith associated processor devices and memory architectures, as ahard-wired computing circuit (or circuits), as a programmable circuit,as a hydraulic, electrical or electro-hydraulic controller, orotherwise. As such, the controller 1022 may be configured to executevarious computational and control functionality with respect to thecompact utility tractor 1000 (or other machinery). In some embodiments,the controller 1022 may be configured to receive input signals invarious formats (e.g., as hydraulic signals, voltage signals, currentsignals, and so on), and to output command signals in various formats(e.g., as hydraulic signals, voltage signals, current signals,mechanical movements, and so on). In some embodiments, the controller1022 (or a portion thereof) may be configured as an assembly ofhydraulic components (e.g., valves, flow lines, pistons and cylinders,and so on), such that control of various devices (e.g., pumps or motors)may be effected with, and based upon, hydraulic, mechanical, or othersignals and movements.

The controller 1022 may be in electronic, hydraulic, mechanical, orother communication with various other systems or devices of the compactutility tractor 1000 (or other machinery), including the front loader1002. For example, the controller 1022 may be in electronic or hydrauliccommunication with various actuators, sensors, and other devices within(or outside of) the compact utility tractor 1000, including variousdevices associated with a hydraulic system of the front loader 1002. Thecontroller 1022 may communicate with other systems or devices (includingother controllers) in various known ways, including via a CAN bus (notshown) of the compact utility tractor 1000, via wireless or hydrauliccommunication means, or otherwise. An example location for thecontroller 1022 is depicted in FIG. 1A. It will be understood, however,that other locations are possible including other locations on thecompact utility tractor 1000, or various remote locations. In someembodiments, the controller 1022 may be configured to receive inputcommands and to interface with an operator via a human-machine interface1026, which may be disposed for easy access by the operator. Thehuman-machine interface 1026 is in communication with the controller1022 over a suitable communication architecture, such as a CAN bus. Thehuman-machine interface 1026 may be configured in a variety of ways andmay include one or more joysticks, various switches or levers, asteering wheel, one or more buttons, a touchscreen interface that may beoverlaid on a display, a keyboard, a speaker, a microphone associatedwith a speech recognition system, or various other human-machineinterface devices.

The compact utility tractor 1000 also has a hydraulic system thatincludes one or more pumps and accumulators (designated generally byreference number 1028), which may be driven by the engine 1012 of thecompact utility tractor 1000. Flow from the pumps 1028 may be routedthrough various control valves and various conduits (e.g., flexiblehoses) to drive various hydraulic cylinders, such as hydraulic cylinders34, 36, 38 associated with the front loader 1002, shown in FIG. 1A. Flowfrom the pumps (and accumulators) 1028 may also power various othercomponents of the compact utility tractor 1000. The flow from the pumps1028 may be controlled in various ways (e.g., through control of variouselectro-hydraulic control valves 1040) to cause movement of thehydraulic cylinders 34, 36, 38, and thus, the front loader 1002 relativeto the compact utility tractor 1000 when the front loader 1002 ismounted on the compact utility tractor 1000 through a suitable mountingarrangement. In this way, for example, movement of the front loader 1002between various positions relative to the chassis 1018 of the compactutility tractor 1000 may be implemented by various control signals tothe pumps 1028, control valves 1040, and so on.

In the embodiment depicted, the front loader 1002 includes the bucket 52pivotally mounted to the HLBAA 50. The arm assemblies 62, 64 are eachconfigured to be coupled to the chassis 18 via a suitable mountingarrangement, at one end, and are coupled at an opposite end to thebucket 52 via the carrier 68. The mounting arrangement may include amast 1030 on each side of the front loader 1002 that cooperates with amounting frame on each side of the compact utility tractor 1000 toremovably couple the front loader 1002 to the compact utility tractor1000.

As discussed with regard to FIGS. 1 and 2, the hydraulic cylinders 34may be actuated to raise and lower the HLBAA 50 relative to the compactutility tractor 1000. In the illustrated example, the HLBAA 50 includestwo hydraulic cylinders, namely the hydraulic cylinder 34 coupledbetween the mast 1030 of the front loader 1002 and the arm assembly 62and a corresponding cylinder on the opposite side of the loader (notshown) coupled between the mast 1030 and the second arm assembly 64. Itshould be noted that the compact utility tractor 1000 may have anynumber of hydraulic cylinders, such as one, three, etc. Each of thehydraulic cylinders 34 includes an end coupled to the mast 1030 (e.g.,via a coupling pin) and an end mounted to the respective one of the armassemblies 62, 64 (e.g., via another pin). Upon activation of thehydraulic cylinders 34, the HLBAA 50 may be moved between variouspositions to elevate the HLBAA 50, and thus the bucket 52, relative tothe chassis 1018 of the compact utility tractor 1000.

The one or more hydraulic cylinders 36 are mounted to the arm assembly62 and the first pivot linkage 70, and the one or more hydrauliccylinders 38 are mounted to the second arm assembly 64 and the secondpivot linkage 72. In the illustrated example, the front loader 1002includes a single hydraulic cylinder 36, 38 associated with a respectiveone of the arm assemblies 62, 64, respectively. Each of the hydrauliccylinders 36, 38 includes an end mounted to a respective one of the armassemblies 62, 64 (via a pin) and an end mounted to the respective oneof the first pivot linkage 70 and the second pivot linkage 72 (viaanother pin). Upon activation of the hydraulic cylinders 36, 38, thebucket 52 may be moved between various positions, namely to pivot thecarrier 68, and thereby the bucket 52, relative to the HLBAA 50. Thus,in the embodiment depicted, the bucket 52 is pivotable about the carrier68 of the HLBAA 50 by the hydraulic cylinders 36, 38. As noted, in someembodiments, a different number or configuration of hydraulic cylindersor other actuators may be used. Accordingly, it will be understood thatthe configuration of the hydraulic system and the HLBAA 50 is presentedas an example only.

Referring also to FIG. 3, the example HLBAA 50 will now be detailed. TheHLBAA 50 includes the arm assembly 62, the second arm assembly 64 andthe hollow torque transfer tube 66 that interconnects the arm assembly62 and the second arm assembly 64. Each of the arm assembly 62 and thesecond arm assembly 64 include a first beam 100, a second beam 102, avehicle mounting subassembly 104, a respective bucket mount bracket orbucket mount bracket subassembly 106, 108 and a knee mountingsubassembly 110. Generally, the arm assembly 62 is a mirror image of thesecond arm assembly 64.

The first beam 100 and the second beam 102 are each formed from thelightweight material. In one example, with reference to FIG. 4, thefirst beam 100 and the second beam 102 are each composed of an innertube 112, a pair of reinforcing layers 114 and a pair of reinforcingplates 116. As the first beam 100 and the second beam 102 have the samecomposition, the composition of the second beam 102 is illustrated inFIG. 4 with the understanding that the composition of the first beam 100is the same. The inner tube 112 has a generally rectangularcross-section. In one example, inner tube 112 is formed from alightweight material, including, but not limited to a polymer-basedmaterial. In this example, the inner tube 112 is composed of apolymer-based resin that includes reinforcing fibers and/or reinforcingparticles. The reinforcing fibers, include, but are not limited to,glass, basalt, carbon, aramids, olefins, and/or cellulose. Thepolymer-based resin may be a thermoset or a thermoplastic. In theexample of a thermoset polymer-based resin, the polymer-based resinincludes, but is not limited to, polyurethane, epoxy, and acrylic. Inthe example of a thermoplastic polymer-based resin, the polymer-basedresin includes, but is not limited to, polyamides, polyolefins,polycarbonates, or polyesters. The inner tube 112 is formed usingwet-ply lay-up, pultrusion, hand lay-up, filament winding, extrusion,injection molding, rotomolding, blow molding, etc.

The pair of reinforcing layers 114 are each coupled to the inner tube112. In one example, the inner tube 112 includes a first surface 112 aopposite a second surface 112 b, and a respective one of the reinforcinglayers 114 is coupled to each of the first surface 112 a and the secondsurface 112 b. In this example, the first surface 112 a and the secondsurface 112 b are a top and a bottom surface, respectively of the innertube 112. The pair of reinforcing layers 114 provides additionalstiffness to the inner tube 112. The pair of reinforcing layers 114 areeach composed of a polymer-based material, including, but not limitedto, a carbon fiber reinforced polymer-based material. In one example,the carbon fibers are aligned longitudinally with the inner tube 112 ina tow form. The carbon fibers may also be a continuous strand mat or 0degree roving, or web. The carbon fiber reinforced polymer-basedmaterial may comprise any suitable carbon fiber reinforced polymer-basedmaterial known in the art. The carbon fibers may be woven with anothermaterial, such as glass fiber, to impart impact resistance. The pair ofreinforcing layers 114 are each formed using wet-ply lay-up, pultrusion,hand lay-up, filament winding, etc. The pair of reinforcing layers 114are coupled to the inner tube 112 by an adhesive, including, but notlimited to polyurethane, epoxy, acrylic, etc. As used herein, “adhesive”or “the adhesive” includes, but is not limited to polyurethane, epoxy,acrylic, etc.

The pair of reinforcing plates 116 is each coupled about the inner tube112 and the pair of reinforcing layers 114 to define an exterior surfaceof the respective one of the first beam 100 and the second beam 102. Thereinforcing plates 116 are each substantially L-shaped and include abody 118 having an inward projecting flange 120. One of the pair ofreinforcing plates 116 is rotated about 180 degrees relative to theother reinforcing plate 116 such that the body 118 and the respectiveinward projecting flange 120 cooperate to enclose the inner tube 112 andthe pair of reinforcing layers 114. Each of the reinforcing plates 116is composed of a metal or metal alloy, such as a steel, and may beformed by stamping, machining, forging, casting, etc. Each of thereinforcing plates 116 are coupled to the inner tube 112 and the pair ofreinforcing layers 114 by the adhesive.

With reference to FIG. 5, the first beam 100 includes a first end 100 aand an opposite second end 100 b. The first end 100 a defines arespective first end of the arm assembly 62 and the second arm assembly64. The first beam 100 defines a first through bore 122 at the first end100 a, and defines a second through bore 124 at the second end 100 b.The first through bore 122 receives a portion of the vehicle mountingsubassembly 104 to couple the vehicle mounting subassembly 104 to thefirst beam 100. The second through bore 124 is coupled to the kneemounting subassembly 110. It should be understood that each of the firstthrough bore 122 and the second through bore 124 are defined in thefirst beam 100 so as to extend through each of the pair of reinforcingplates 116 and the inner tube 112. In one example, the second end 100 bof the first beam 100 is beveled from a first surface 100 d to a second,opposite surface 100 c. By beveling the second end 100 b, the second end100 b of the first beam 100 may be positioned against a cooperatingbevel defined on a third end 102 a of the second beam 102 so that thesecond beam 102 extends at an angle relative to the first beam 100.

The second beam 102 includes the third end 102 a and an opposite fourthend 102 b. The fourth end 102 b defines a respective second end of thearm assembly 62 and the second arm assembly 64. In one example, thethird end 102 a of the second beam 102 is beveled from a first surface102 d to a second, opposite surface 102 c. By beveling the third end 102a, the second beam 102 extends at an angle relative to the first beam100 to assist in coupling the bucket 52 (FIG. 1) to the HLBAA 50. Thesecond beam 102 defines a third through bore 126 at the third end 102 a,and defines a fourth bore 128 and a fifth bore 129 at the fourth end 102b. The third through bore 126 is coupled to the knee mountingsubassembly 110. It should be understood that the third through bore 126is defined in the second beam 102 so as to extend through each of thepair of reinforcing plates 116 and the inner tube 112. The fourth bore128 and the fifth bore 129 each receives a portion of the bucket mountbracket subassembly 106, 108 and the torque transfer tube 66 to couplethe bucket mount bracket subassembly 106, 108 and the torque transfertube 66 to the second beam 102. In this example, with reference to FIG.11, the fourth bore 128 has a diameter that is less than a diameter ofthe fifth bore 129. The fourth bore 128 is defined in the second beam102 so as to extend through one of the pair of reinforcing plates 116and the inner tube 112 and so as to be coaxial with the fifth bore 129.The fifth bore 129 is defined in the second beam 102 so as to extendthrough the other of the pair of reinforcing plates 116, and is sized toreceive the torque transfer tube 66 therethrough.

The vehicle mounting subassembly 104 is coupled to the first end 100 aof each first beam 100 of the arm assembly 62 and the second armassembly 64. Stated another way, the vehicle mounting subassembly 104 iscoupled to the first end of each of the arm assembly 62 and the secondarm assembly 64 and is configured to couple the arm assembly 62 and thesecond arm assembly 64 to the loader 10. With reference to FIG. 5, thevehicle mounting subassembly 104 is shown in greater detail. As thevehicle mounting subassembly 104 is the same for both the arm assembly62 and the second arm assembly 64, the vehicle mounting subassembly 104will be shown in detail herein with regard to the first beam 100 of thearm assembly 62 for ease of description, with the understanding that thevehicle mounting subassembly 104 coupled to the second arm assembly 64is the same.

A portion of the vehicle mounting subassembly 104 passes through thefirst end 100 a of the first beam 100 for coupling the respective one ofthe arm assembly 62 and the second arm assembly 64 to the loader 10.With reference to FIG. 7, in one example, the vehicle mountingsubassembly 104 includes a pair of lock plates 130, a sleeve 132 and ablock 134. Each of the pair of lock plates 130 is composed of a metal ormetal alloy, including, but not limited to, steel, and is cast, forged,stamped, etc. Each of the pair of lock plates 130 is annular; however,each of the pair of lock plates 130 may have any desired shape. Each ofthe pair of lock plates 130 defines a central bore 136. In one example,the central bore 136 includes a plurality of threads 136 a. Theplurality of threads 136 a cooperates with the sleeve 132 to couple thevehicle mounting subassembly 104 to the first beam 100. Each of the pairof lock plates 130 may also define a plurality of coupling bores 138. Inone example, each bore 138 of the plurality of coupling bores 138 arespaced apart about a perimeter or circumference of the respective one ofthe pair of lock plates 130 to receive a tool or instrument tofacilitate rotating the respective one of the pair of lock plates 130into threaded engagement with the sleeve 132. The pair of lock plates130 are generally coupled to the first beam 100 so as to be on opposedsurfaces 100 e, 100 f of the first beam 100.

The sleeve 132 is received through the first through bore 122 and theblock 134. In this example, the sleeve 132 is a hollow cylinder, andincludes a first end 132 a opposite a second end 132 b and a midsection132 c that extends between the first end 132 a and the second end 132 b.The sleeve 132 is composed of a metal or metal alloy, including, but notlimited to, steel, and is cast, forged, stamped, etc. The first end 132a and the second end 132 b each include a plurality of threads 140 a,140 b. The plurality of threads 140 a, 140 b matingly engage with theplurality of threads 136 a of a respective one of the pair of lockplates 130 to couple the vehicle mounting subassembly 104 to the firstbeam 100. The sleeve 132 defines a sleeve bore 141 that extends from thefirst end 132 a to the second end 132 b. The sleeve bore 141 enables apin 252 (FIG. 2) to pass through the vehicle mounting subassembly 104 tocouple the respective one of the arm assembly 62 and the second armassembly 64 to the loader 10.

The block 134 is sized to be received wholly within the inner tube 112at the first end 100 a of the first beam 100. In one example, the block134 is substantially square; however, the block 134 may be rectangular.The block 134 is composed of a polymer-based material, including, butnot limited to, a glass-reinforced polymer-based material. For example,the block 134 is composed of G10 glass-fiber mat reinforced epoxymaterial. The block 134 may be formed using wet-ply lay-up, pultrusion,hand lay-up autoclave, compression molding, injection molding,extrusion, etc. The block 134 defines a central cross-bore 142. Withreference to FIG. 8, the cross-bore 142 receives a portion of the sleeve132 therethrough. The block 134 supports the sleeve 132 within the firstbeam 100. The block 134 may be coupled to the inner tube 112 via theadhesive, which may surround the block 134 to fixedly retain the block134 within the inner tube 112.

With reference back to FIG. 5, the bucket mount bracket subassembly 106,108 couples the bucket 52 (FIG. 1) to the HLBAA 50. With reference toFIGS. 9 and 10, the bucket mount bracket subassembly 106 is shown ingreater detail. As the bucket mount bracket subassembly 106 is a mirrorimage of the bucket mount bracket subassembly 108, for ease ofdescription, the bucket mount bracket subassembly 106 will be discussedherein with the understanding that the bucket mount bracket subassembly108 ii is substantially the same. The bucket mount bracket subassembly106 includes a first outer plate 150, a second inner plate 152, a flangeassembly 154, a retaining flange 156 (FIG. 10) and a second block 158(FIG. 10).

The first outer plate 150 is planar, and extends along a third surface102 e of the second beam 102. The third surface 102 e is opposite afourth surface 102 f. In one example, the first outer plate 150 iscomposed of a metal or metal alloy, such as steel, and may be formed bystamping, casting, forging, etc. With reference to FIG. 10, the firstouter plate 150 has a first plate end 160 and an opposite second plateend 162. The first plate end 160 defines a first plate bore 164, whichcooperates with the torque transfer tube 66 to couple the torquetransfer tube 66 to the arm assembly 62. The second plate end 162defines a second plate bore 166, which receives a portion of the flangeassembly 154. The first outer plate 150 has a first plate surface 150 aopposite a second plate surface 150 b. The first plate bore 164 and thesecond plate bore 166 are defined through the first outer plate 150 soas to extend from the first plate surface 150 a to the second platesurface 150 b. The first plate surface 150 a defines an exterior surfaceof the first outer plate 150. A portion of the second plate surface 150b is coupled to the respective one of the pair of reinforcing plates116, via welding, for example, and a remainder of the second platesurface 150 b is coupled to the flange assembly 154.

The second inner plate 152 is planar, and extends along the fourthsurface 102 f of the second beam 102 (FIG. 9). In one example, thesecond inner plate 152 is composed of a metal or metal alloy, such assteel, and may be formed by stamping, casting, forging, etc. Withreference to FIG. 10, the second inner plate 152 has a third plate end170 and an opposite fourth plate end 172. The third plate end 170defines a third plate bore 174, which cooperates with the torquetransfer tube 66 to couple the torque transfer tube 66 to the armassembly 62. The fourth plate end 172 defines a fourth plate bore 176,which receives a portion of the flange assembly 154. The second innerplate 152 has a third plate surface 152 a opposite a fourth platesurface 152 b. The third plate bore 174 and the fourth plate bore 176are defined through the second inner plate 152 so as to extend from thethird plate surface 152 a to the fourth plate surface 152 b. A portionof the third plate surface 152 a is coupled to the respective one of thepair of reinforcing plates 116, via welding, for example, and aremainder of the third plate surface 152 a is coupled to the flangeassembly 154. The fourth plate surface 152 b defines an exterior surfaceof the second inner plate 152.

The flange assembly 154 cooperates with the first outer plate 150 andthe second inner plate 152 for coupling the bucket 52 (FIG. 1) to thearm assembly 62. In one example, the flange assembly 154 includes a base180, a pair of retaining flanges 182 ii and a bushing 184. The base 180and the pair of retaining flanges 182 are generally integrally formed,and may be stamped, cast, machined, etc. The base 180 and the pair ofretaining flanges 182 may be composed of metal or metal alloy,including, but not limited to, steel. The base 180 is substantially flator planar, and includes a first base surface 180 a opposite a secondbase surface 180 b. The first base surface 180 a is coupled to theretaining flange 156, via welding, for example. The pair of retainingflanges 182 extend upwardly from opposed sides of the second basesurface 180 b. Each of the pair of retaining flanges 182 defines a bore186. Each of the bores 186 are coaxially aligned and configured toreceive the bushing 184.

The bushing 184 comprises a hollow cylinder, which has a first bushingend 184 a opposite a second bushing end 184 b. A bushing midsection 184c extends between the first bushing end 184 a and the second bushing end184 b. The bushing 184 is composed of metal or metal alloy, including,but not limited to, steel, and is cast, forged, stamped, extruded, etc.The first bushing end 184 a is received through a respective one of thebores 186 and is coupled to the respective one of the pair of retainingflanges 182, via welding, for example. The second bushing end 184 b isreceived through a respective one of the bores 186 and is coupled to therespective one of the pair of retaining flanges 182, via welding, forexample. The bushing midsection 184 c is positioned between the pair ofretaining flanges 182, and is configured to receive a portion of a hook52 a (FIG. 2) of the bucket 52 to couple the bucket 52 to the armassembly 62.

The retaining flange 156 is substantially U-shaped, and is composed ofmetal or metal alloy, including, but not limited to, steel, and is cast,forged, stamped, extruded, etc. In this example, the retaining flange156 includes a first leg 190, an opposite second leg 192 and a retainingbase 194. The first leg 190 and the second leg 192 extend outwardly fromthe retaining base 194. The retaining base 194 includes a first surface194 a opposite a second surface 194 b. The second surface 194 b iscoupled to the first base surface 180 a of the base 180 of the flangeassembly 154. In one example, the second surface 194 b is coupled to thefirst base surface 180 a via welding. The first leg 190, the second leg192 and the first surface 194 a of the retaining base 194 are eachcoupled to the second block 158.

The second block 158 is received wholly within the inner tube 112 at thefourth end 102 b of the second beam 102. In one example, the secondblock 158 is substantially square; however, the second block 158 may berectangular. The second block 158 is composed of a polymer-basedmaterial, including, but not limited to, a glass-reinforcedpolymer-based material. For example, the second block 158 is composed ofG10 glass-fiber mat reinforced epoxy material. The second block 158 maybe formed ii using wet-ply lay-up, pultrusion, hand lay-up autoclave,compression molding, injection molding, extrusion, etc. The second block158 defines a central second cross-bore 196, and a pair of opposed slots198. As will be discussed, the second cross-bore 196 receives a portionof the torque transfer tube 66 therethrough. The second block 158supports the torque transfer tube 66 within the second beam 102. Withreference to FIG. 11, the second block 158 is shown received within theinner tube 112 such that the fourth bore 128 and the fifth bore 129 ofthe second beam 102 are coaxially aligned with the second cross-bore196. The pair of opposed slots 198 receive a respective one of the firstleg 190 and the second leg 192. Each of the pair of opposed slots 198include a layer of the adhesive, such that the respective one of thefirst leg 190 and the second leg 192 are coupled to the second block 158via the adhesive layer defined in the respective one of the slots 198.With reference back to FIG. 10, the first surface 194 a of the retainingbase 194 is also coupled to a side 158 a of the second block 158, viathe adhesive, for example. In addition, the second block 158 may becoupled to the inner tube 112 via the adhesive, which may surround thesecond block 158 to fixedly retain the second block 158 within the innertube 112.

As shown in FIG. 12, the bucket mount bracket subassembly 106 is coupledto the second beam 102 such that the second block 158 is received whollywithin the inner tube 112 of the second beam 102, and the flangeassembly 154 is disposed external to the second beam 102. The first leg190 and the second leg 192 are coupled to the slots 198, and theretaining base 194 is coupled to the base 180 of the flange assembly154.

With reference to FIG. 13, the knee mounting subassembly 110interconnects the first beam 100 with the second beam 102. The kneemounting subassembly 110 includes a pair of knee plates 200, an angledblock 202 (FIG. 14) and a pair of coupling pins 204. The pair of kneeplates 200 comprises connecting plates for interconnecting the firstbeam 100 with the second beam 102. Each of the knee plates 200 iscomposed of metal or metal alloy, including, but not limited to, steel,and is cast, forged, stamped, extruded, etc. The knee plates 200 areeach coupled to a respective two of the reinforcing plates 116, viawelding, for example. With reference to FIG. 14, each of the pair ofknee plates 200 includes a first plate end 206 opposite a second plateend 208, and a first plate side 210 opposite a second plate side 212.The first plate end 206 defines a first plate bore 214 for coupling therespective knee plate 200 to the first beam 100. A second plate bore 216is defined through each of the knee plates 200 between the first platebore 214 and the second plate end 208. Each of the knee plates 200 alsodefines a first pin bore 218 along the first plate side 210 and a secondpin bore 220 along the second plate side 210. The first pin bore 218receives one of the coupling pins 204, ii and the second pin bore 220receives the other of the coupling pins 204.

With reference to FIG. 15, the angled block 202 is received whollywithin a portion of the first beam 100 and the second beam 102 when thearm assembly 62 is assembled. The angled block 202 is composed of apolymer-based material, including, but not limited to, aglass-reinforced polymer-based material. For example, the angled block202 is composed of G10 glass-fiber mat reinforced epoxy material. Theangled block 202 may be formed using wet-ply lay-up, pultrusion, handlay-up autoclave, compression molding, injection molding, extrusion,etc. With reference back to FIG. 14, the angled block 202 has a firstblock end 222 and a second block end 224. The second block end 224 isangled relative to the first block end 222. Stated another way, thefirst block end 222 extends along an axis A, and the second block end224 extends along a second axis A2, and the second axis A2 is oblique tothe axis A. A first block bore 226 is defined through the angled block202 at the first block end 222, and a second block bore 228 is definedthrough the angled block 202 at the second block end 224. When theangled block 202 is positioned within the first beam 100 and the secondbeam 102, the first block bore 226 is coaxially aligned with the secondthrough bore 124 of the first beam 100 and the second block bore 228 iscoaxially aligned with the third through bore 126 of the second beam102. When the knee plates 200 are coupled to the respective reinforcingplates 116, the first plate bore 214 is coaxially aligned with thesecond through bore 124 of the first beam 100 and the first block bore226 to enable a mechanical fastener 227, such as a bolt, to be receivedthrough the first plate bore 214 of each of the knee plates 200, thefirst block bore 226 and the second through bore 124, and secured with aflange nut 229, for example, to couple the first beam 100 to the pair ofknee plates 200. The second plate bore 216 is coaxially aligned with thethird through bore 126 of the second beam 102 and the second block bore228 to enable another mechanical fastener 227, such as a bolt, to bereceived through the second plate bore 216 of each of the knee plates200, the second block bore 228 and the third through bore 126 andsecured with another flange nut 229, for example, to couple the secondbeam 102 to the pair of knee plates 200. In addition, the angled block202 may be coupled to the inner tube 112 of each of the first beam 100and the second beam 102 via the adhesive, which may surround the angledblock 202 to fixedly retain the angled block 202 within the inner tube112 of each of the first beam 100 and the second beam 102.

The pair of coupling pins 204 couple the hydraulic cylinders 34, 36, 38to the respective one of the arm assembly 62 and the second arm assembly64. Each of the coupling pins 204 includes a pair of collars 230. Thepair of collars 230 secures and retains the coupling pins 204 to thepair of knee plates 200. Generally, one of the coupling pins 204 isreceived through each of the first pin bores 218 and the other one ofthe coupling pins 204 is received through each of the second pin bores220. A first one of the collars 230 is coupled to one end of one of thecoupling pins 204, and a second one of the pair of collars 230 iscoupled to the other opposed end of the respective one of the couplingpins 204. One of the pair of collars 230 is coupled to one end of theother one of the coupling pins 204, and the second one of the pair ofcollars 230 is coupled to the opposed end of the other coupling pins204. Thus, each of the collars 230 includes a central collar bore 230 athat receives the respective end of the coupling pin 204 therein (FIG.13). In one example, each end of the coupling pins 204 includes athrough bore 204 a that cooperates with corresponding cross-bores 230 bdefined in each of the collars 230. A pin is received within the throughbores 204 a and the cross-bores 230 b to couple the coupling pins 204 tothe knee plates 200. Each of the coupling pins 204 may also include abore 204 b, which receives a pin, to couple the respective hydrauliccylinders 34, 36, 38 to the respective one of the arm assembly 62 andthe second arm assembly 64.

With reference back to FIG. 3, the torque transfer tube 66 interconnectsthe arm assembly 62 and the second arm assembly 64. The torque transfertube 66 is coupled to each of the arm assembly 62 and the second armassembly 64 at the fourth end 102 b of the respective second beam 102.With reference to FIG. 16, the torque transfer tube 66 has a first tubeend 240 and an opposite second tube end 242. The first tube end 240 iscoupled to the arm assembly 62, and the second tube end 242 is coupledto the second arm assembly 64. The torque transfer tube 66 is a hollowcylindrical tube, and is composed of a polymer-based material. In oneexample, the torque transfer tube 66 is composed of a polymer-basedresin that includes reinforcing fibers and/or reinforcing particles. Thereinforcing fibers, include, but are not limited to, glass, basalt,carbon, aramids, olefins, and/or cellulose. The polymer-based resin maybe a thermoset or a thermoplastic. In the example of a thermosetpolymer-based resin, the polymer-based resin includes, but is notlimited to, polyurethane, epoxy, and acrylic. In the example of athermoplastic polymer-based resin, the polymer-based resin includes, butis not limited to, polyamides, polyolefins, polycarbonates, orpolyesters. The torque transfer tube 66 is formed using wet-ply lay-up,pultrusion, hand lay-up, filament winding, extrusion, injection molding,rotomolding, blow molding, etc.

With reference to FIG. 17, the first tube end 240 is shown in greaterdetail. As the first tube end 240 is a mirror image of the second tubeend 242, the first tube end 240 will be described in detail herein withthe understanding that the second tube end 242 is substantially thesame. The first tube end 240 includes a third block 244. The third blockii 244 is received wholly within the torque transfer tube 66 at thefirst tube end 240. In one example, with reference to FIG. 18, the thirdblock 244 is substantially cylindrical; however, the third block 244 mayhave any desired shape. The third block 244 is composed of apolymer-based material, including, but not limited to, aglass-reinforced polymer-based material. For example, the third block244 is composed of G10 glass-fiber mat reinforced epoxy material. Thethird block 244 may be formed using wet-ply lay-up, pultrusion, handlay-up autoclave, compression molding, injection molding, extrusion,etc. The third block 244 includes a mechanical fastener 246, such as abolt, which is integrally formed with or monolithic with the third block244. The mechanical fastener 246 is generally formed with the thirdblock 244 such that the mechanical fastener 246 extends along a centralaxis A3 of the third block 244 or is centered relative to the thirdblock 244. The mechanical fastener 246 is formed with the third block244 such that a shank 246 a of the mechanical fastener 246 extends adistance beyond the third block 244 for receiving a flange nut 248, forexample, to couple the first tube end 240 to the arm assembly 62.

It should be noted that while the third block 244 is described herein asbeing composed of G10 material, the third block 244 may alternatively becomposed of a bulk molding compound, including, but not limited to,glass-fiber reinforced thermoset or thermoplastic polymer-basedmaterial. In the example of the third block 244 composed of bulk moldingcompound, the mechanical fastener 246 may be molded into the bulkmolding compound, via compression or injection molding, for example, toform the third block 244.

Generally, with reference to FIG. 16, when the torque transfer tube 66is coupled to the arm assembly 62, the first tube end 240 is receivedthrough the second cross-bore 196 of the second block 158 and the shank246 a of the mechanical fastener 246 extends through the fourth bore 128of the second beam 102 and the first plate bore 164 of the first outerplate 150. The flange nut 248 is coupled to the shank 246 a andtightened to the first outer plate 150 for coupling the torque transfertube 66 to the arm assembly 62. In addition, the adhesive may be appliedto a surface 244 a of the third block 244(FIG. 18) to aid in couplingthe third block 244 to the inner tube 112 of the second beam 102.Further, the adhesive may be applied about a second surface 244 b (FIG.18) or the perimeter of the third block 244 to aid in coupling the thirdblock 244 to the first tube end 240 of the torque transfer tube 66. Inone example, the adhesive is also applied about the second cross-bore196 to further couple the first tube end 240 to the second block 158.

With reference back to FIG. 5, the first beams 100, the second beams102, the ii vehicle mounting assemblies 104, the bucket mount bracketsubassemblies 106, 108, the knee mounting subassemblies 110, the torquetransfer tube 66, the adhesive, the mechanical fasteners 227 and theflange nuts 229 comprise a kit 250 for the HLBAA 50. In one example, inorder to assemble the arm assembly 62 and the second arm assembly 64,the reinforcing layers 114 are coupled to the inner tubes 112, via theadhesive, for example. With the angled blocks 202 formed, with referenceto FIG. 15, the angled blocks 202 are inserted into a second end 112 cof a respective one of the inner tubes 112 associated with the firstbeam 100 and a first end 112 d of a respective one of the inner tubes112 associated with the second beam 102 to couple two of the inner tubes112 together. This is repeated to form two subassemblies, one for eachof the arm assembly 62 and the second arm assembly 64. The adhesive maybe applied to the angled blocks 202 and used to couple the angled blocks202 to the inner tubes 112.

With reference to FIG. 10, with the retaining flanges 182 formed withthe base 180, the bushing 184 is inserted through the bores 186 andcoupled to the retaining flanges 182, via welding, for example. With theretaining flange 156 formed, the retaining flange 156 is coupled to thebase 180, via welding, for example. With the second block 158 formed,the retaining flange 156 is coupled to the second block 158. Generally,with a layer of the adhesive applied to the slots 198 and the surface158 a of the second block 158, the first leg 190 and the second leg 192are coupled to the slots 198 such that the first surface 194 a contactsthe surface 158 a of the second block 158. The second block 158 isinserted into a second end 112 e of the inner tube 112 associated withone of the second beams 102. In one example, the adhesive is appliedabout the second block 158 to further couple the second block 158 to theinner tube 112. This process is repeated to couple another one of thesecond blocks 158 to the inner tube 112 associated with the other of thesecond beams 102.

With reference to FIG. 7, with the blocks 134 formed, one of the blocks134 is inserted into a first end 112 d of the inner tube 112 associatedwith one of the first beams 100, and the other of the blocks 134 isinserted into the first end 112 d of the inner tube 112 associated withthe other of the first beams 100. The blocks 134 may be coupled to theinner tubes 112 via the adhesive, which may surround the blocks 134 tofixedly retain the blocks 134 within the inner tubes 112. One of thesleeves 132 is inserted through the first through bore 122 and thecross-bore 142 of the block 134 coupled to the inner tube 112 associatedwith the first beam 100 of the arm assembly 62, and the other of thesleeves 132 is inserted through the first through bore 122 and thecross-bore 142 of the block 134 coupled to the inner tube 112 associatedwith the first beam 100 of the second arm assembly 64.

With reference to FIGS. 4 and 5, with the reinforcing plates 116 formed,the reinforcing plates 116 are coupled about each of the first beam 100and the second beam 102, via the adhesive, for example. The knee plates200 are coupled to the reinforcing plates 116, via welding, for example.The first outer plate 150 and the second inner plate 152 are coupled tothe reinforcing plates 116 associated with the second beams 102, viawelding, for example. One of the pair of lock plates 130 is coupled tothe first end 132 a of the sleeve 132 of the arm assembly 62, and theother one of the lock plates 130 is coupled to the second end 132 b tocouple the sleeve 132 to the first beam 100 of the arm assembly 62. Oneof the pair of lock plates 130 is coupled to the first end 132 a of thesleeve 132 of the second arm assembly 64, and the other one of the lockplates 130 is coupled to the second end 132 b to couple the sleeve 132to the first beam 100 of the second arm assembly 64.

With reference to FIG. 14, the mechanical fasteners 227 are insertedthrough the first plate bores 214 of each pair of knee plates 200 andthe first block bore 226 of the angled block 202. The mechanicalfasteners 227 are secured with the flange nut 229. The mechanicalfasteners 227 are inserted through the second plate bores 216 of eachpair of knee plates 200 and the second block bore 228 of the angledblock 202. The mechanical fasteners 227 are secured with the flange nut229 to reinforce the connection of the knee plates 200 to the respectivefirst beam 100 and the second beam 102. The coupling pins 204 areinserted through the first pin bore 218 and the second pin bore 220,respectively, and the collars 230 are coupled about the opposed ends ofthe coupling pins 204. Pins are inserted through the bores 204 a of thecoupling pins 204 and the cross-bores 232 b of the collars 230 to couplethe coupling pins 204 to the respective pair of knee plates 200.

With reference to FIGS. 18 and 19, with the torque transfer tube 66formed, the adhesive is applied to the surface 244 a and the secondsurface 244 b of the third block 244 and the third block 244 is insertedinto the first tube end 240. This process is repeated to couple anotherone of the third blocks 244 to the second tube end 242. With the thirdblock 244 coupled to the first tube end 240, the first tube end 240 ispositioned within the second cross-bore 196 of the second block 158 suchthat the shank 246 a extends through the fourth bore 128 of the secondbeam 102 and the first plate bore 164 of the first outer plate 150. Inone example, the adhesive is applied about the second cross-bore 196 tofurther couple the first tube end 140 to the second block 158. Theflange nut 248 is coupled to the shank 246 a to couple the first tubeend 240 to the arm assembly 62. With reference to FIG. 16, the secondtube end 242 is positioned within the second cross-bore 196 of thesecond block 158 such that the shank 246 a extends through the fourthbore 128 of the second beam 102 and the first plate bore 164 of thefirst outer plate 150. In one example, the adhesive is applied about thesecond cross-bore 196 to further couple the second tube end 242 to thesecond block 158. The flange nut 248 is coupled to the shank 246 a tocouple the second tube end 242 to the arm assembly 62.

With the HLBAA 50 assembled, with reference to FIG. 2, the first end 100a of the first beams 100 of the HLBAA 50 may be coupled to the loader 10(FIG. 1) or the compact utility tractor 1000 (FIG. 1A) via a pin 252engaging the sleeves 132 of the respective vehicle mounting assemblies104. The fourth end 102 b of the second beams 102 of the HLBAA 50 may becoupled to the respective couplers 74, 76 for coupling the bucket 52(FIG. 1 or FIG. 1A) to the HLBAA 50 by engaging the coupling pins 80with each of the bushings 184 of each of the bucket mount bracketsubassemblies 106, 108 and the couplers 74, 76. The hydraulic cylinders34, 36, 38 may also be coupled to the coupling pins 204 of the armassembly 62 and the second arm assembly 64.

It should be noted that the HLBAA 50 described with regard to FIGS. 1-19may be configured differently to couple a work implement, such as thebucket 52, to a work vehicle, such as the loader 10. In one example,with reference to FIGS. 20-35, a HLBAA 300 is shown. As the HLBAA 300includes components that are substantially similar to or the same as theHLBAA 50 discussed with regard to FIGS. 1-19, the same referencenumerals will be used to denote the same or similar features. The HLBAA300 may couple the bucket 52 to the loader 10, or may couple the bucket52 to the compact utility tractor 1000. It should be noted that theHLBAA 300 may also be used with a variety of other work vehicles. Inthis example, the HLBAA 300 includes an arm assembly 302, a second armassembly 304 and the hollow torque transfer tube 66 that interconnectsthe arm assembly 302 and the second arm assembly 304. Each of the armassembly 302 and the second arm assembly 304 include a first beam 310, asecond beam 312, a vehicle mounting subassembly 314, a respective bucketmount bracket or bucket mount bracket subassembly 316, 318 and a kneemounting subassembly 320. Generally, the arm assembly 302 is a mirrorimage of the second arm assembly 304.

The first beam 310 and the second beam 312 are each formed from thelightweight material. In one example, with reference to FIG. 21, thefirst beam 310 and the second beam 312 are each composed of the innertube 112 and an outer tube 322. As the first beam 310 and the secondbeam 312 have the same composition, the composition of the first beam310 is illustrated in FIG. 20 with the understanding that thecomposition of the second beam 312 is the same. The outer tube 322 has agenerally rectangular cross-section, and is sized to receive the innertube 112 such that the inner tube 112 is disposed wholly within theouter tube 322 (FIG. 22). In one example, outer tube 322 is formed froma lightweight material, including, but not limited to a polymer-basedmaterial. In this example, the outer tube 322 is composed of apolymer-based resin that includes reinforcing fibers and/or reinforcingparticles. The reinforcing fibers, include, but are not limited to,glass, basalt, carbon, aramids, olefins, and/or cellulose. Thepolymer-based resin may be a thermoset or a thermoplastic. In theexample of a thermoset polymer-based resin, the polymer-based resinincludes, but is not limited to, polyurethane, epoxy, and acrylic. Inthe example of a thermoplastic polymer-based resin, the polymer-basedresin includes, but is not limited to, polyamides, polyolefins,polycarbonates, or polyesters. The outer tube 322 is formed usingwet-ply lay-up, pultrusion, hand lay-up, filament winding, extrusion,injection molding, rotomolding, blow molding, etc. In one example, theadhesive is applied between an inner surface 322 a of the outer tube 322and an outer surface 112 g of the inner tube 112 to couple the outertube 322 to the inner tube 112. For example, the adhesive is applied asa coating, for example, on the outer surface 112 g of the inner tube112.

With reference to FIG. 23, the first beam 310 includes a first end 310 aand an opposite second end 310 b. The first end 310 a defines arespective first end of the arm assembly 302 and the second arm assembly304. The first beam 310 defines the first through bore 122 at the firstend 310 a, and defines the second through bore 124 at the second end 310b. The first through bore 122 receives a portion of the vehicle mountingsubassembly 314 to couple the vehicle mounting subassembly 314 to thefirst beam 310. The second through bore 124 is coupled to the kneemounting subassembly 320. It should be understood that each of the firstthrough bore 122 and the second through bore 124 are defined in thefirst beam 310 so as to extend through the inner tube 112 and the outertube 322. In one example, the second end 310 b of the first beam 310 isbeveled from a first surface 310 d to a second, opposite surface 310 c.By beveling the second end 310 b, the second end 310 b of the first beam310 may be positioned against a cooperating bevel defined on a third end312 a of the second beam 312 so that the second beam 312 extends at anangle relative to the first beam 310.

The second beam 312 includes the third end 312 a and an opposite fourthend 312 b. The fourth end 312 b defines a respective second end of thearm assembly 302 and the second arm assembly 304. In one example, thethird end 312 a of the second beam 312 is beveled from a first surface312 d to a second, opposite surface 312 c. By beveling the third end 312a, the second beam 312 extends at an angle relative to the first beam310 to assist in coupling the bucket 52 (FIG. 1) to the HLBAA 300. Thesecond beam 312 defines the third through bore 126 at the third end 312a, and defines the fourth bore 128 and the fifth bore 129 at the fourthend 312 b. The third through bore 126 is coupled to the knee mountingsubassembly 320. It should be understood that the third through bore 126is defined in the second beam 312 so as to extend through each of theouter tube 322 and the inner tube 112. The fourth bore 128 and the fifthbore 129 each receives a portion of the bucket mount bracket subassembly316, 318 and the torque transfer tube 66 to couple the bucket mountbracket subassembly 316, 318 and the torque transfer tube 66 to thesecond beam 312. In this example, the fourth bore 128 is defined in thesecond beam 102 so as to extend through one side of the outer tube 322and the inner tube 112 and so as to be coaxial with the fifth bore 129.The fifth bore 129 is defined in the second beam 312 so as to extendthrough the other side of the outer tube 322 and the inner tube 112, andis sized to receive the torque transfer tube 66 therethrough.

The vehicle mounting subassembly 314 is coupled to the first end 310 aof each first beam 310 of the arm assembly 302 and the second armassembly 304. Stated another way, the vehicle mounting subassembly 314is coupled to the first end of each of the arm assembly 302 and thesecond arm assembly 304 and is configured to couple the arm assembly 302and the second arm assembly 304 to the loader 10. With reference to FIG.24, the vehicle mounting subassembly 314 is shown in greater detail. Asthe vehicle mounting subassembly 314 is the same for both the armassembly 302 and the second arm assembly 304, the vehicle mountingsubassembly 314 will be shown in detail herein with regard to the firstbeam 310 of the arm assembly 302 for ease of description, with theunderstanding that the vehicle mounting subassembly 314 coupled to thesecond arm assembly 304 is the same.

A portion of the vehicle mounting subassembly 314 passes through thefirst end 310 a of the first beam 310 for coupling the respective one ofthe arm assembly 302 and the second arm assembly 304 to the loader 10(FIG. 1). With reference to FIG. 25, in one example, the vehiclemounting subassembly 314 includes the pair of lock plates 130, thesleeve 132, the block 134 and a pair of reinforcing plates 330.

The pair of lock plates 130 is generally coupled to the first beam 310so as contact a respective one of the pair of reinforcing plates 330.The sleeve 132 is received through the first through bore 122 and theblock 134, and the plurality of threads 140 a, 140 b matingly engagewith the plurality of threads 136 a of a respective one of the pair oflock plates 130 to couple the vehicle mounting subassembly 314 to thefirst beam 310. The sleeve 132 enables the pin 252 (FIG. 2) to passthrough the vehicle mounting subassembly 314 the couple the respectiveone of the arm assembly 302 and the second arm assembly 304 to theloader 10 (FIG. 1). The block 134 is sized to be received wholly withinthe inner tube 112 at the first end 310 a of the first beam 310. Theblock 134 supports the sleeve 132 within the first beam 310. The block134 may be coupled to the inner tube 112 via the adhesive, which maysurround the block 134 to fixedly retain the block 134 within the innertube 112.

The pair of reinforcing plates 330 is each coupled about the outer tube322 at the first end 310 a of the first beam 310 to define an exteriorsurface of the first beam 310 at the first end 310 a. The reinforcingplates 330 are each substantially L-shaped and include a body 332 havingan inwardly projecting flange 334. One of the pair of reinforcing plates330 is rotated about 180 degrees relative to the other reinforcing plate330 such that the body 332 and the respective inwardly projecting flange334 cooperate to enclose the outer tube 322. Each of the reinforcingplates 330 is composed of a metal or metal alloy, such as a steel, andmay be formed by stamping, machining, forging, casting, etc. Each of thereinforcing plates 330 are coupled to the outer tube 322 by theadhesive. The body 332 of each of the reinforcing plates 330 defines acentral plate bore 336. With regard to FIG. 26, each of the centralplate bores 336 receives a portion of the sleeve 132 therethrough toenable the ends 132 a, 132 b of the sleeve 132 to matingly engage withthe respective one of the lock plates 130.

With reference back to FIG. 23, the bucket mount bracket subassembly316, 318 couples the bucket 52 (FIG. 1) to the HLBAA 300. With referenceto FIGS. 27 and 28, the bucket mount bracket subassembly 316 is shown ingreater detail. As the bucket mount bracket subassembly 316 is a mirrorimage of the bucket mount bracket subassembly 318, for ease ofdescription, the bucket mount bracket subassembly 316 will be discussedherein with the understanding that the bucket mount bracket subassembly318 is substantially the same. The bucket mount bracket subassembly 316includes the first outer plate 150, the second inner plate 152, theflange assembly 154, the retaining flange 156 (FIG. 28), the secondblock 158 (FIG. 28), a first reinforcing plate 340 and a secondreinforcing plate 342.

The first outer plate 150 is planar, and extends along a portion of thesecond reinforcing plate 342 (FIG. 27). The first plate surface 150 adefines an exterior surface of the first outer plate 150. A portion ofthe second plate surface 150 b is coupled to the second reinforcingplate 342, via welding, for example, and a remainder of the second platesurface 150 b is coupled to the flange assembly 154. The second innerplate 152 is planar, and extends along a portion of the firstreinforcing plate 340 (FIG. 27). A portion of the third plate surface152 a is coupled to the first reinforcing plates 340, via welding, forexample, and a remainder of the third plate surface 152 a is coupled tothe flange assembly 154. The fourth plate surface 152 b defines anexterior surface of the second inner plate 152. The flange assembly 154cooperates with the first outer plate 150 and the second inner plate 152for coupling the bucket 52 (FIG. 1) to the arm assembly 302. The secondblock 158 is received wholly within the inner tube 112 at the fourth end312 b of the second beam 312. With reference to FIG. 29, the secondblock 158 is shown received within the inner tube 112 such that thefourth bore 128 and the fifth bore 129 of the second beam 312 arecoaxially aligned with the second cross-bore 196. In addition, thesecond block 158 may be coupled to the inner tube 112 via the adhesive,which may surround the second block 158 to fixedly retain the secondblock 158 within the inner tube 112.

As shown in FIG. 12, the bucket mount bracket subassembly 106 is coupledto the second beam 102 such that the second block 158 is received whollywithin the inner tube 112 of the second beam 102, and the flangeassembly 154 is disposed external to the second beam 102. The first leg190 and the second leg 192 are coupled to the slots 198, and theretaining base 194 is coupled to the base 180 of the flange assembly154.

The first reinforcing plate 340 and the second reinforcing plate 342 arecoupled about the outer tube 322 at the fourth end 312 b of the secondbeam 312 to define an exterior surface of the second beam 312 at thefourth end 312 b. The first reinforcing plate 340 and the secondreinforcing plate 342 are each substantially L-shaped. Each of the firstreinforcing plate 340 and the second reinforcing plate 342 are composedof a metal or metal alloy, such as a steel, and may be formed bystamping, machining, forging, casting, etc. Each of the firstreinforcing plate 340 and the second reinforcing plate 342 are coupledto the outer tube 322 by the adhesive. The first reinforcing plate 340includes a body 344 having an inwardly projecting flange 346. The body344 defines a central bore 348. With reference to FIG. 30, the centralbore 348 is coaxial with the first plate bore 164 of the first outerplate 150 and the fourth bore 128 of the second beam 312 when assembled.With reference back to FIG. 28, the second reinforcing plate 342includes a body 350 having an inwardly projecting flange 352. The body350 defines a second central bore 354. With reference to FIG. 30, thesecond central bore 354 is coaxial with the third plate bore 174 of thesecond inner plate 152 and the fifth bore 129 of the second beam 312when assembled. As shown in FIG. 27, the first reinforcing plate 340 andthe second reinforcing plate 342 cooperate to enclose the outer tube 322at the fourth end 312 b.

With reference to FIG. 31, the knee mounting subassembly 320interconnects the first beam 310 with the second beam 312. The kneemounting subassembly 320 includes the pair of knee plates 200, theangled block 202 (FIG. 32), the pair of coupling pins 204, a first pairof reinforcing plates 360 and a second pair of reinforcing plates 362.The knee plates 200 are each coupled to each of the first pair ofreinforcing plates 360 and the second pair of reinforcing plates 362,via welding, for example. With reference to FIG. 32, the angled block202 is received wholly within a portion of the inner tube 112 of thefirst beam 310 and a portion of the inner tube 112 of the second beam312 when the arm assembly 302 is assembled. When the angled block 202 ispositioned within the first beam 310 and the second beam 312, the firstblock bore 226 is coaxially aligned with the second through bore 124 ofthe first beam 310 and the second block bore 228 is coaxially alignedwith the third through bore 126 of the second beam 312. The pair ofcoupling pins 204 couple the hydraulic cylinders 34, 36, 38 to therespective one of the arm assembly 302 and the second arm assembly 304.

The first pair of reinforcing plates 360 is coupled about the outer tube322 at the second end 310 b of the first beam 310 to define an exteriorsurface of the first beam 310 at the second end 310 b. The first pair ofreinforcing plates 360 is substantially L-shaped and includes a body 364having an inwardly projecting flange 368. One of the first pair ofreinforcing plates 360 is rotated about 180 degrees relative to theother reinforcing plate 360 such that the body 364 and the respectiveinwardly projecting flange 368 of each of the first pair of reinforcingplates 360 cooperate to enclose the outer tube 322. Each of the firstpair of reinforcing plates 360 is composed of a metal or metal alloy,such as a steel, and may be formed by stamping, machining, forging,casting, etc. Each of the first pair of reinforcing plates 360 arecoupled to the outer tube 322 by the adhesive. The body 364 of each ofthe first pair of reinforcing plates 360 defines a central plate bore370.

The second pair of reinforcing plates 362 is coupled about the outertube 322 at the third end 312 a of the second beam 312 to define anexterior surface of the second beam 312 at the third end 312 a. Thesecond pair of reinforcing plates 362 is substantially L-shaped andincludes a body 372 having an inwardly projecting flange 374. One of thesecond pair of reinforcing plates 362 is rotated about 180 degreesrelative to the other reinforcing plate 362 such that the body 372 andthe respective inwardly projecting flange 374 of each of the second pairof reinforcing plates 362 cooperate to enclose the outer tube 322. Eachof the second pair of reinforcing plates 362 is composed of a metal ormetal alloy, such as a steel, and may be formed by stamping, machining,forging, casting, etc. Each of the second pair of reinforcing plates 362are coupled to the outer tube 322 by the adhesive. The body 372 of eachof the second pair of reinforcing plates 362 defines a central platebore 376.

When the knee plates 200 are coupled to the first pair of reinforcingplates 360, the central plate bore 370 is coaxially aligned with thesecond through bore 124 of the first beam 310 and the first block bore226 to enable the mechanical fastener 227 to be received through thefirst plate bore 214 of each of the knee plates 200, the first blockbore 226, the second through bore 124 and the central plate bore 370,and secured with the flange nut 229 to couple the first beam 310 to thepair of knee plates 200. The central plate bore 376 is coaxially alignedwith the third through bore 126 of the second beam 312 and the secondblock bore 228 to enable another mechanical fastener 227 to be receivedthrough the second plate bore 216 of each of the knee plates 200, thesecond block bore 228, the third through bore 126 and the central platebore 376 and secured with another flange nut 229 to couple the secondbeam 312 to the pair of knee plates 200.

With reference back to FIG. 20, the torque transfer tube 66interconnects the arm assembly 302 and the second arm assembly 304. Thetorque transfer tube 66 is coupled to each of the arm assembly 302 andthe second arm assembly 304 at the fourth end 312 b of the respectivesecond beam 312. With reference to FIG. 33, the first tube end 240 iscoupled to the arm assembly 302, and the second tube end 242 is coupledto the second arm assembly 304. With reference to FIG. 34, the firsttube end 240 is shown coupled to the second beam 312 in greater detail.The third block 244 is received wholly within the torque transfer tube66 at the first tube end 240. Generally, when the torque transfer tube66 is coupled to the arm assembly 302, the first tube end 240 isreceived through the second cross-bore 196 of the second block 158 andthe shank 246 a of the mechanical fastener 246 extends through thefourth bore 128 of the second beam 312, the second central bore 354 ofthe second reinforcing plate 342 and the first plate bore 164 of thefirst outer plate 150. The flange nut 248 is coupled to the shank 246 aand tightened to the first outer plate 150 for coupling the torquetransfer tube 66 to the arm assembly 302. In addition, the adhesive maybe applied to the surface 244 a of the third block 244 to aid incoupling the third block 244 to the inner tube 112 of the second beam312. Further, the adhesive may be applied about the second surface 244 bor the perimeter of the third block 244 to aid in coupling the thirdblock 244 to the first tube end 240 of the torque transfer tube 66. Inone example, the adhesive is applied about the second cross-bore 196 tofurther couple the first tube end 240 to the second block 158.

With reference back to FIG. 23, the first beams 310, the second beams312, the vehicle mounting assemblies 314, the bucket mount bracketsubassemblies 316, 318, the knee mounting subassemblies 320, the torquetransfer tube 66 the adhesive, the mechanical fasteners 227 and theflange nuts 229 comprise a kit 380 for the HLBAA 300. In one example, inorder to assemble the arm assembly 302 and the second arm assembly 304,with the inner tubes 112 formed, in one example, the inner tubes 112 arecoated with the adhesive, and the inner tubes 112 are positioned withinthe respective outer tubes 322 to couple the respective inner tubes 112to the outer tubes 322 (FIG. 21). With the angled blocks 202 formed,with reference to FIG. 32, the angled blocks 202 are inserted into asecond end 112 c of a respective one of the inner tubes 112 associatedwith the first beam 310 and a first end 112 d of a respective one of theinner tubes 112 associated with the second beam 312 to couple two of theinner tubes 112 together, as also shown in FIG. 35. This is repeated toform two subassemblies, one for each of the arm assembly 302 and thesecond arm assembly 304. The adhesive may be applied to the angledblocks 202 and used to couple the angled blocks 202 to the inner tubes112.

With reference to FIG. 28, with the retaining flanges 182 formed withthe base 180, the bushing 184 is inserted through the bores 186 andcoupled to the retaining flanges 182, via welding, for example. With theretaining flange 156 formed, the retaining flange 156 is coupled to thebase 180, via welding, for example. With the second block 158 formed,the retaining flange 156 is coupled to the second block 158. Generally,with a layer of the adhesive applied to the slots 198 and the surface158 a of the second block 158, the first leg 190 and the second leg 192are coupled to the slots 198 such that the first surface 194 a contactsthe surface 158 a of the second block 158. The second block 158 isinserted into a second end 112 e of the inner tube 112 associated withone of the second beams 312. In one example, the adhesive is appliedabout the second block 158 to further couple the second block 158 to theinner tube 112. This process is repeated to couple another one of thesecond blocks 158 to the inner tube 112 associated with the other of thesecond beams 312.

With reference to FIG. 25, with the blocks 134 formed, one of the blocks134 is inserted into a first end 112 f of the inner tube 112 associatedwith one of the first beams 100, and the other of the blocks 134 isinserted into a first end 112 f of the inner tube 112 associated withthe other of the first beams 310. The blocks 134 may be coupled to theinner tubes 112 via the adhesive, which may surround the blocks 134 tofixedly retain the blocks 134 within the inner tubes 112. One of thesleeves 132 is inserted through the first through bore 122 and thecross-bore 142 of the block 134 coupled to the inner tube 112 associatedwith the first beam 310 of the arm assembly 302, and the other of thesleeves 132 is inserted through the first through bore 122 and thecross-bore 142 of the block 134 coupled to the inner tube 112 associatedwith the first beam 310 of the second arm assembly 304.

With reference to FIG. 32, with the first pair of reinforcing plates 360formed, the first pair of reinforcing plates 360 is coupled about eachof the first beams 310, via the adhesive, for example. With the secondpair of reinforcing plates 362 formed, the second pair of reinforcingplates 362 are coupled about each of the second beams 312, via theadhesive, for example. The knee plates 200 are coupled to thereinforcing plates 360, 362, via welding, for example. With reference toFIG. 28, with the first reinforcing plate 340 and the second reinforcingplate 342 formed, the first reinforcing plate 340 and the secondreinforcing plate 342 are coupled about the second beams 312, via theadhesive, for example. The first outer plates 150 are coupled to thesecond reinforcing plates 342 and the second inner plates 152 arecoupled to the first reinforcing plates 340, via welding, for example.With reference to FIG. 25, with the reinforcing plates 330 formed, thereinforcing plates 330 are coupled about the first beams 310, via theadhesive, for example. One of the pair of lock plates 130 is coupled tothe first end 132 a of the sleeve 132 of the arm assembly 302, and theother one of the lock plates 130 is coupled to the second end 132 b tocouple the sleeve 132 to the first beam 310 of the arm assembly 302. Oneof the pair of lock plates 130 is coupled to the first end 132 a of thesleeve 132 of the second arm assembly 304, and the other one of the lockplates 130 is coupled to the second end 132 b to couple the sleeve 132to the first beam 310 of the second arm assembly 304.

With reference to FIG. 32, the mechanical fasteners 227 are insertedthrough the first plate bores 214 of each pair of knee plates 200, thefirst block bore 226 of the angled block 202 and the central plate bore370 of the first pair of reinforcing plates 360. The mechanicalfasteners 227 are secured with the flange nut 229, for example. Themechanical fasteners 227 are inserted through the second plate bores 216of each pair of knee plates 200, the second block bore 228 of the angledblock 202 and the central plate bore 376 of the second pair ofreinforcing plates 362. The mechanical fasteners 227 are secured withthe flange nut 229 to reinforce the connection of the knee plates 200 tothe respective first beam 310 and the second beam 312. The coupling pins204 are inserted through the first pin bore 218 and the second pin bore220, respectively, and the collars 230 are coupled about the opposedends of the coupling pins 204. Pins are inserted through the bores 204 aof the coupling pins 204 and the cross-bores 232 b of the collars 230 tocouple the coupling pins 204 to the respective pair of knee plates 200.

With reference to FIGS. 33 and 34, with the torque transfer tube 66formed, the adhesive is applied to the surface 244 a and the secondsurface 244 b of the third block 244 and the third block 244 is insertedinto the first tube end 240. This process is repeated to couple anotherone of the third blocks 244 to the second tube end 242. With the thirdblock 244 coupled to the first tube end 240, the first tube end 240 ispositioned within the second cross-bore 196 of the second block 158 suchthat the shank 246 a extends through the fourth bore 128 of the secondbeam 312 and the first plate bore 164 of the first outer plate 150. Inone example, the adhesive is applied about the second cross-bore 196 tofurther couple the first tube end 140 to the second block 158. Theflange nut 248 is coupled to the shank 246 a to couple the first tubeend 240 to the arm assembly 302. With reference to FIG. 16, the secondtube end 242 is positioned within the second cross-bore 196 of thesecond block 158 such that the shank 246 a extends through the fourthbore 128 of the second beam 312 and the first plate bore 164 of thefirst outer plate 150. In one example, the adhesive is applied about thesecond cross-bore 196 to further couple the second tube end 242 to thesecond block 158. The flange nut 248 is coupled to the shank 246 a tocouple the second tube end 242 to the arm assembly 302.

With the HLBAA 300 assembled, the first end 310 a of the first beams 310of the HLBAA 300 may be coupled to the loader 10 (FIG. 1) or the compactutility tractor 1000 (FIG. 1A) via the pin 252 (FIG. 2) engaging thesleeves 132 of the respective vehicle mounting assemblies 314. Thefourth end 312 b of the second beams 312 of the HLBAA 300 may be coupledto the couplers 74, 76 for coupling the bucket 52 (FIG. 1 or FIG. 1A) tothe HLBAA 300 by engaging the coupling pins 80 (FIG. 2) with each of thebushings 184 of each of the bucket mount bracket subassemblies 316, 318and the couplers 74, 76. The hydraulic cylinders 34, 36, 38 may also becoupled to the coupling pins 204 of the arm assembly 302 and the secondarm assembly 304.

It should be noted that the HLBAA 50 described with regard to FIGS. 1-19may be configured differently to couple a work implement, such as thebucket 52, to a work vehicle, such as the loader 10. In one example,with reference to FIGS. 36-40, a HLBAA 400 is shown. As the HLBAA 400includes components that are substantially similar to or the same as theHLBAA 50 discussed with regard to FIGS. 1-19 and the HLBAA 300 discussedwith regard to FIGS. 20-35, the same reference numerals will be used todenote the same or similar features. The HLBAA 400 may couple the bucket52 to the loader 10, or may couple the bucket 52 to the compact utilitytractor 1000. It should be noted that the HLBAA 400 may also be usedwith a variety of other work vehicles. In this example, with referenceto FIGS. 36 and 37, the HLBAA 400 includes an arm assembly 402, a secondarm assembly 404 and the hollow torque transfer tube 66 thatinterconnects the arm assembly 402 and the second arm assembly 404. Eachof the arm assembly 402 and the second arm assembly 404 include a firstbeam 410, a second beam 412, the vehicle mounting subassembly 314, therespective bucket mount bracket or bucket mount bracket subassembly 316,318 and the knee mounting subassembly 320. Generally, the arm assembly402 is a mirror image of the second arm assembly 404.

The first beam 410 and the second beam 412 are each formed from thelightweight material. In one example, with reference to FIG. 38, thefirst beam 410 and the second beam 412 are each composed of the outertube 322. As the first beam 410 and the second beam 412 have the samecomposition, the composition of the first beam 410 is illustrated inFIG. 38 with the understanding that the composition of the second beam412 is the same. As discussed, the outer tube 322 is composed of apolymer-based resin that includes reinforcing fibers and/or reinforcingparticles. The reinforcing fibers, include, but are not limited to,glass, basalt, carbon, aramids, olefins, and/or cellulose. Thepolymer-based resin may be a thermoset or a thermoplastic. In theexample of a thermoset polymer-based resin, the polymer-based resinincludes, but is not limited to, polyurethane, epoxy, and acrylic. Inthe example of a thermoplastic polymer-based resin, the polymer-basedresin includes, but is not limited to, polyamides, polyolefins,polycarbonates, or polyesters. The outer tube 322 is formed usingwet-ply lay-up, pultrusion, hand lay-up, filament winding, extrusion,injection molding, rotomolding, blow molding, etc.

With reference to FIG. 37, the first beam 410 includes a first end 410 aand an opposite second end 410 b. The first end 410 a defines arespective first end of the arm assembly 402 and the second arm assembly404. The first beam 410 defines the first through bore 122 at the firstend 410 a, and defines the second through bore 124 at the second end 410b. The first through bore 122 receives a portion of the vehicle mountingsubassembly 414 to couple the vehicle mounting subassembly 414 to thefirst beam 410. The second through bore 124 is coupled to the kneemounting subassembly 320. In one example, the second end 410 b of thefirst beam 410 is beveled. By beveling the second end 410 b, the secondend 410 b of the first beam 410 may be positioned against a cooperatingbevel defined on a third end 412 a of the second beam 412 so that thesecond beam 412 extends at an angle relative to the first beam 410.

The second beam 412 includes the third end 412 a and an opposite fourthend 412 b. The fourth end 412 b defines a respective second end of thearm assembly 402 and the second arm assembly 404. In one example, thethird end 412 a of the second beam 412 is beveled. By beveling the thirdend 412 a, the second beam 412 extends at an angle relative to the firstbeam 410 to assist in coupling the bucket 52 (FIG. 1) to the HLBAA 400.The second beam 412 defines the third through bore 126 at the third end412 a, and defines the fourth bore 128 and the fifth bore 129 at thefourth end 412 b. The third through bore 126 is coupled to the kneemounting subassembly 320. The fourth bore 128 and the fifth bore 129each receives a portion of the bucket mount bracket subassembly 316, 318and the torque transfer tube 66 to couple the bucket mount bracketsubassembly 316, 318 and the torque transfer tube 66 to the second beam412.

The vehicle mounting subassembly 314 is coupled to the first end 410 aof each first beam 410 of the arm assembly 402 and the second armassembly 404 and is configured to couple the arm assembly 402 and thesecond arm assembly 404 to the loader 10. With reference to FIG. 39, inone example, the vehicle mounting subassembly 314 includes the pair oflock plates 130, the sleeve 132, the block 134 and the pair ofreinforcing plates 330. The pair of lock plates 130 is generally coupledto the first beam 310 so as contact a respective one of the pair ofreinforcing plates 330. The sleeve 132 is received through the firstthrough bore 122 and the block 134, and the plurality of threads 140 a,140 b matingly engage with the plurality of threads 136 a of arespective one of the pair of lock plates 130 to couple the vehiclemounting subassembly 314 to the first beam 310. The sleeve 132 enablesthe pin 252 (FIG. 2) to pass through the vehicle mounting subassembly314 the couple the respective one of the arm assembly 402 and the secondarm assembly 404 to the loader 10 (FIG. 1). The block 134 is sized to bereceived wholly within the outer tube 322 at the first end 410 a of thefirst beam 410. The block 134 may be coupled to the outer tube 322 viathe adhesive, which may surround the block 134 to fixedly retain theblock 134 within the outer tube 322. The pair of reinforcing plates 330is coupled about the outer tube 322 at the first end 410 a of the firstbeam 310 to define an exterior surface of the first beam 410 at thefirst end 410 a. Each of the reinforcing plates 330 are coupled to theouter tube 322 by the adhesive.

With reference back to FIG. 37, the bucket mount bracket subassembly316, 318 couples the bucket 52 (FIG. 1) to the HLBAA 400. As the bucketmount bracket subassembly 316 is a mirror image of the bucket mountbracket subassembly 318, for ease of description, the bucket mountbracket subassembly 316 will be discussed herein with the understandingthat the bucket mount bracket subassembly 318 is substantially the same.The bucket mount bracket subassembly 316 includes the first outer plate150, the second inner plate 152, the flange assembly 154, the retainingflange 156 (FIG. 40), the second block 158 (FIG. 40), the firstreinforcing plate 340 and the second reinforcing plate 342.

The flange assembly 154 cooperates with the first outer plate 150 andthe second inner plate 152 for coupling the bucket 52 (FIG. 1) to thearm assembly 402. The second block 158 is received wholly within theouter tube 322 at the fourth end 412 b of the second beam 412. Thesecond block 158 is received within the outer tube 322 such that thefourth bore 128 and the fifth bore 129 of the second beam 412 arecoaxially aligned with the second cross-bore 196 of the second block158. In addition, the second block 158 may be coupled to the outer tube322 via the adhesive, which may surround the second block 158 to fixedlyretain the second block 158 within the outer tube 322. The bucket mountbracket subassembly 316 is coupled to the second beam 412 such that thesecond block 158 is received wholly within the outer tube 322 of thesecond beam 412, and the flange assembly 154 is disposed external to thesecond beam 412 (FIG. 40). The first leg 190 and the second leg 192 arecoupled to the slots 198, and the retaining base 194 is coupled to thebase 180 of the flange assembly 154. The first reinforcing plate 340 andthe second reinforcing plate 342 are coupled about the outer tube 322 atthe fourth end 412 b of the second beam 412, via the adhesive, forexample, to define an exterior surface of the second beam 412 at thefourth end 412 b. The first reinforcing plate 340 and the secondreinforcing plate 342 cooperate to enclose the outer tube 322 at thefourth end 412 b.

The knee mounting subassembly 320 interconnects the first beam 410 withthe second beam 412. The knee mounting subassembly 320 includes the pairof knee plates 200, the angled block 202 (FIG. 40), the pair of couplingpins 204, the first pair of reinforcing plates 360 and the second pairof reinforcing plates 362. The angled block 202 is received whollywithin a portion of the outer tube 322 of the first beam 410 and aportion of the outer tube 322 of the second beam 412 when the armassembly 402 is assembled. The first pair of reinforcing plates 360 iscoupled about the outer tube 322 at the second end 410 b of the firstbeam 410 to define an exterior surface of the first beam 410 at thesecond end 410 b. The second pair of reinforcing plates 362 is coupledabout the outer tube 322 at the third end 412 a of the second beam 412,via the adhesive, for example, to define an exterior surface of thesecond beam 412 at the third end 412 a.

The torque transfer tube 66 interconnects the arm assembly 402 and thesecond arm assembly 404. The torque transfer tube 66 is coupled to eachof the arm assembly 402 and the second arm assembly 404 at the fourthend 412 b of the respective second beam 412. In this example, theadhesive may be applied to the surface 244 a of the third block 244 toaid in coupling the third block 244 to the outer tube 322 of the secondbeam 412 (FIG. 40). In one example, the adhesive is also applied aboutthe second cross-bore 196 of the second blocks 158 to further couple thefirst tube end 240 and the second tube end 242 to the respective secondblock 158.

The first beams 410, the second beams 412, the vehicle mountingassemblies 314, the bucket mount bracket subassemblies 316, 318, theknee mounting subassemblies 320, the torque transfer tube 66, theadhesive, the mechanical fasteners 227 and the flange nuts 229 comprisea kit 450 for the HLBAA 400. In one example, in order to assemble thearm assembly 402 and the second arm assembly 404, with the outer tubes322 formed and the angled blocks 202 formed, with reference to FIG. 40,the angled blocks 202 are inserted into the second end 410 b of arespective one of the outer tubes 322 associated with the first beam 410and the third end 412 a of a respective one of the outer tubes 322associated with the second beam 412 to couple two of the outer tubes 322together. This is repeated to form two subassemblies, one for each ofthe arm assembly 402 and the second arm assembly 404. The adhesive maybe applied to the angled blocks 202 and used to couple the angled blocks202 to the outer tubes 322 of the first beam 410 and the second beam412.

With reference to FIGS. 37 and 40, with the retaining flanges 182 formedwith the base 180, the bushing 184 is inserted through the bores 186 andcoupled to the retaining flanges 182, via welding, for example. With theretaining flange 156 formed, the retaining flange 156 is coupled to thebase 180, via welding, for example. With the second block 158 formed,the retaining flange 156 is coupled to the second block 158 (FIG. 34).Generally, with a layer of the adhesive applied to the slots 198 and thesurface 158 a of the second block 158, the first leg 190 and the secondleg 192 are coupled to the slots 198 such that the first surface 194 acontacts the surface 158 a of the second block 158. The second block 158is inserted into the fourth end 412 b of one the second beams 412. Inone example, the adhesive is applied about the second block 158 tofurther couple the second block 158 to the outer tube 322. This processis repeated to couple another one of the second blocks 158 to the outertube 322 associated with the other of the second beams 312.

With reference to FIGS. 37 and 40, with the blocks 134 formed, one ofthe blocks 134 is inserted into the first end 410 a of one of the firstbeams 410, and the other of the blocks 134 is inserted into the firstend 410 a of the other of the first beams 410. The blocks 134 may becoupled to the outer tube 322 via the adhesive, which may surround theblocks 134 to fixedly retain the blocks 134 within the outer tube 322.One of the sleeves 132 is inserted through the first through bore 122and the cross-bore 142 of the block 134 coupled to the first beam 410 ofthe arm assembly 402, and the other of the sleeves 132 is insertedthrough the first through bore 122 and the cross-bore 142 of the block134 coupled to the first beam 410 of the second arm assembly 404.

With reference to FIGS. 37 and 40, with the first pair of reinforcingplates 360 formed, the first pair of reinforcing plates 360 is coupledabout each of the first beams 410, via the adhesive, for example. Withthe second pair of reinforcing plates 362 formed, the second pair ofreinforcing plates 362 are coupled about each of the second beams 412,via the adhesive, for example. The knee plates 200 are coupled to thereinforcing plates 360, 362, via welding, for example. With reference toFIG. 28, with the first reinforcing plate 340 and the second reinforcingplate 342 formed, the first reinforcing plate 340 and the secondreinforcing plate 342 are coupled about the second beams 412, via theadhesive, for example. The first outer plates 150 are coupled to thesecond reinforcing plates 342 and the second inner plates 152 arecoupled to the first reinforcing plates 340, via welding, for example.With the reinforcing plates 330 formed, the reinforcing plates 330 arecoupled about the first beams 410, via the adhesive, for example. One ofthe pair of lock plates 130 is coupled to the first end 132 a of thesleeve 132 of the arm assembly 402, and the other one of the lock plates130 is coupled to the second end 132 b to couple the sleeve 132 to thefirst beam 410 of the arm assembly 402. One of the pair of lock plates130 is coupled to the first end 132 a of the sleeve 132 of the secondarm assembly 404, and the other one of the lock plates 130 is coupled tothe second end 132 b to couple the sleeve 132 to the first beam 410 ofthe second arm assembly 404.

With reference to FIG. 37, the mechanical fasteners 227 are insertedthrough the first plate bores 214 of each pair of knee plates 200 (FIG.32), the first block bore 226 of the angled block 202 and the centralplate bore 370 of the first pair of reinforcing plates 360. Themechanical fasteners 227 are secured with the flange nut 229, forexample. The mechanical fasteners 227 are inserted through the secondplate bores 216 of each pair of knee plates 200, the second block bore228 of the angled block 202 and the central plate bore 376 of the secondpair of reinforcing plates 362. The mechanical fasteners 227 are securedwith the flange nut 229 to reinforce the connection of the knee plates200 to the respective first beam 410 and the second beam 412. Thecoupling pins 204 are inserted through the first pin bore 218 and thesecond pin bore 220, respectively, and the collars 230 are coupled aboutthe opposed ends of the coupling pins 204. Pins are inserted through thebores 204 a of the coupling pins 204 and the cross-bores 232 b of thecollars 230 to couple the coupling pins 204 to the respective pair ofknee plates 200.

With reference to FIGS. 37 and 40, with the torque transfer tube 66formed, the adhesive is applied to the surface 244 a and the secondsurface 244 b of the third block 244 and the third block 244 is insertedinto the first tube end 240. This process is repeated to couple anotherone of the third blocks 244 to the second tube end 242. With the thirdblock 244 coupled to the first tube end 240, the first tube end 240 ispositioned within the second cross-bore 196 of the second block 158 suchthat the shank 246 a extends through the fourth bore 128 of the secondbeam 412 and the first plate bore 164 of the first outer plate 150. Inone example, the adhesive is applied about the second cross-bore 196 tofurther couple the first tube end 140 to the second block 158. Theflange nut 248 is coupled to the shank 246 a to couple the first tubeend 240 to the arm assembly 62. The second tube end 242 is positionedwithin the second cross-bore 196 of the second block 158 such that theshank 246 a extends through the fourth bore 128 of the second beam 412and the first plate bore 164 of the first outer plate 150. In oneexample, the adhesive is applied about the second cross-bore 196 tofurther couple the second tube end 242 to the second block 158. Theflange nut 248 is coupled to the shank 246 a to couple the second tubeend 242 to the arm assembly 402.

With the HLBAA 400 assembled, the first end 410 a of the first beams 410of the HLBAA 400 may be coupled to the loader 10 (FIG. 1) or the compactutility tractor 1000 (FIG. 1A) via the pin 252 (FIG. 2) engaging thesleeves 132 of the respective vehicle mounting assemblies 314. Thefourth end 412 b of the second beams 412 of the HLBAA 400 may be coupledto the couplers 74, 76 for coupling the bucket 52 (FIG. 1 or FIG. 1A) tothe HLBAA 400 by engaging the coupling pins 80 (FIG. 2) with each of thebushings 184 of each of the bucket mount bracket subassemblies 316, 318and the couplers 74, 76. The hydraulic cylinders 34, 36, 38 may also becoupled to the coupling pins 204 of the arm assembly 402 and the secondarm assembly 404.

It should be noted that the HLBAA 50 described with regard to FIGS.1-19, the HLBAA 300 described with regard to FIGS. 20-35 and the HLBAA400 described with regards to FIGS. 36-40 may be configured differentlyto couple a work implement, such as the bucket 52, to a work vehicle,such as the loader 10. In one example, with reference to FIGS. 41 and42, one or more of the blocks 134, 158, 202 may be configureddifferently to assist in coupling the respective one of the blocks 134,158, 202 to the respective one of the first beams 100, 310, 410 and/orsecond beams 102, 312, 412. For example, each of the blocks 134, 158,202 may include at least one or a plurality of ribs 460. The ribs 460may be formed integrally with or are monolithic with the respectiveblock 134, 158, 202. In the example of FIGS. 41 and 42, an example block134′ is shown with four integral ribs 460. The ribs 460 are defined orformed integrally with the block 134′ on each of the four sides 462a-462 d of the block 134′. Each of the ribs 460 extend a distance beyondthe respective side 462 a-462 d of the block 134′ to assist inpositioning the block 134′ within the respective first beam 100, 310,410. It should be noted that while the ribs 460 are illustrated asrectangular, the ribs 460 may have any desired shape that extends adistance above the respective side 462 a-462 d to aid in the insertionof the block 134′ into the respective first beam 100, 310, 410. Itshould also be understood that the third block 244 may also include oneor more of the ribs 460 to aid in the insertion of the third block 244into the torque transfer tube 66.

It should be noted that the HLBAA 50 described with regard to FIGS.1-19, the HLBAA 300 described with regard to FIGS. 20-35 and the HLBAA400 described with regards to FIGS. 36-40 may be configured differentlyto couple a work implement, such as the bucket 52, to a work vehicle,such as the loader 10. In one example, with reference to FIGS. 43 and44, one or more of the blocks 134, 158, 202 may be configureddifferently to assist in coupling the respective one of the blocks 134,158, 202 to the respective one of the first beams 100, 310, 410 and/orsecond beams 102, 312, 412. For example, each of the blocks 134, 158,202 may include at least one insert or foam block 470. In the example ofFIGS. 43 and 44, the block 134 is shown. It should be noted that thefoam block 470 may be employed with the second block 158 and the angledblock 202. Moreover, the foam block 470 may be employed with the thirdblock 244 to couple the third block 244 to the torque transfer tube 66.

The foam block 470 may be discrete from the respective block 134, 158,202, and may be composed of a suitable medium-density foam. In oneexample, the foam block 470 is composed of polyurethane, and is insertmolded. Alternatively, the foam block 470 may be molded into therespective one of the first beams 100, 310, 410 and/or second beams 102,312, 412 during the formation of the respective one of the first beams100, 310, 410 and/or second beams 102, 312, 412. The foam block 470 hasa cross-section that corresponds to a cross-section of the respectiveone of the respective one of the first beams 100, 310, 410 and/or secondbeams 102, 312, 412 such that the foam block 470 may be positionedwithin the respective one of the first beams 100, 310, 410 and/or secondbeams 102, 312, 412. With reference to FIG. 44, the foam block 470 isgenerally inserted into the respective one of the first beams 100, 310,410 and/or second beams 102, 312, 412 prior to the insertion of therespective block 134, 158, 202 to serve as a dam to prevent the furtheradvancement of the adhesive 472 within the respective one of the firstbeams 100, 310, 410 and/or second beams 102, 312, 412. Stated anotherway, the foam block 470 blocks the flow of the adhesive 472 through therespective one of the first beams 100, 310, 410 and/or second beams 102,312, 412, which results in the adhesive 472 encapsulating and bondingthe respective one of the blocks 134, 158, 202 to the respective one ofthe first beams 100, 310, 410 and/or second beams 102, 312, 412. In theexample of the third block 244, the foam block 470 may have a circularcross-section to block the flow of the adhesive 472 through the torquetransfer tube 66, which results in the adhesive 472 encapsulating andbonding the third blocks 244 to the torque transfer tube 66.

It should be noted that the HLBAA 50 described with regard to FIGS.1-19, the HLBAA 300 described with regard to FIGS. 20-35 and the HLBAA400 described with regards to FIGS. 36-40 may be configured differentlyto couple a work implement, such as the bucket 52, to a work vehicle,such as the loader 10. In one example, with reference to FIGS. 45 and46, one or more of the blocks 134, 158, 202 may be configureddifferently to assist in coupling the respective one of the blocks 134,158, 202 to the respective one of the first beams 100, 310, 410 and/orsecond beams 102, 312, 412. For example, each of the blocks 134, 158,202 may include at least one energy activated foam block 480. In theexample of FIGS. 45 and 45, the block 134 is shown. It should be notedthat the energy activated foam block 480 may be employed with the secondblock 158 and the angled block 202. Moreover, the energy activated foamblock 480 may be employed with the third block 244 to couple the thirdblock 244 to the torque transfer tube 66.

The energy activated foam block 480 may be composed of an energyactivated foam, including, but not limited to, expandable epoxy productscommercially available from Sika Automotive AG, such as SIKAREINFORCER®,which may be co-molded with the respective block 134, 158, 202, 244. Inthis example, the energy activated foam block 480 may be activated by anexternal source to cause the energy activated foam block 480 to expandinto a foam layer 480′ that encapsulates and secures the respectiveblock 134, 158, 202 to the respective one of the first beams 100, 310,410 and/or second beams 102, 312, 412 as shown in FIG. 46. In theexample of the third block 244, the energy activated foam block 480 maybe activated by an external source to cause the energy activated foamblock 480 to expand into the foam layer 480′ and encapsulate and securethe third block 244 to the torque transfer tube 66.

It should be noted that the HLBAA 50 described with regard to FIGS.1-19, the HLBAA 300 described with regard to FIGS. 20-35 and the HLBAA400 described with regards to FIGS. 36-40 may be configured differentlyto couple a work implement, such as the bucket 52, to a work vehicle,such as the loader 10. In one example, with reference to FIG. 47, one ormore of the blocks 134, 158, 202 and the first beams 100, 310, 410and/or second beams 102, 312, 412 may be configured differently toassist in coupling the respective one of the blocks 134, 158, 202 to therespective one of the first beams 100, 310, 410 and/or second beams 102,312, 412. For example, each of the blocks 134, 158, 202 may be formedwith a circular cross-section, which may be received within acorresponding circular cross-section defined in the respective one ofthe first beams 100, 310, 410 and/or second beams 102, 312, 412. In theexample of FIG. 47, a first beam 410′ is shown with a hexagonalcross-section 490, which defines an internal cylindrical bore 492. Thehexagonal cross-section 490 of first beam 410′ is integrally formed withthe first beam 410′, via pultrusion, for example. A block 134′ is formedwith a circular cross-section 494, and is sized to be received withinthe cylindrical bore 492. The circular cross-section 494 of block 134′is formed, via pultrusion, for example. Alternatively, the block 134′may comprise a tube having a thickened wall, which is formed from G10material via pultrusion, for example. By forming the block 134′ with thecircular cross-section, the adhesive 496 may be disposed about theperimeter of the block 134′, and the block 134′ may be inserted andbonded to the first beam 410′ by inserting the block 134′ and twistingthe block 134′ within the first beam 410′, which may reduce assemblytime.

Also, the following examples are provided, which are numbered for easierreference:

1. A hybrid loader boom arm assembly for a loader work vehicle, theloader boom arm comprising: an arm assembly that includes: a hollowfirst beam formed from a lightweight material; a block formed from asecond lightweight material, the block having a first block end receivedwithin a first end of the first beam; at least one first steelreinforcing plate coupled to the first beam at the end; and at least oneconnecting plate coupled to the at least one first reinforcing plate.

2. The loader boom arm of example 1, wherein the first beam has a thirdend opposite the first end, and the third end receives a second blockformed from the second lightweight material.

3. The loader boom arm of example 2, wherein the second block defines across-bore and the loader boom arm further comprises a sleeve, thesleeve coupled to the cross-bore and configured to couple the armassembly to the loader work vehicle.

4. The loader boom arm of example 3, further comprising a pair of lockplates coupled to opposed ends of the sleeve to retain the sleeve withinthe cross-bore at the third end of the first beam.

5. The loader boom arm of example 4, further comprising at least onesecond steel reinforcing plate, the at least one second steelreinforcing plate coupled to the third end of the first beam and atleast one of the pair of lock plates is adjacent to the at least onesecond steel reinforcing plate.

6. The loader boom arm of example 5, wherein the at least one secondsteel plate extends from the first end of the first beam to the thirdend of the first beam.

7. The loader boom arm of example 1, wherein the block has a secondblock end, the loader boom arm further comprising a hollow second beamformed from the lightweight material and at least one third steelreinforcing plate coupled to the second beam at the second end, thesecond block end received within a second end of the ii second beam tocouple the second beam to the first beam, the second beam has a fourthend opposite the second end, and a third block formed from the secondlightweight material is coupled within the fourth end.

8. The loader boom arm of example 7, wherein the third block defines apair of opposed slots and a third bore, and the loader boom arm furthercomprises a bucket mount bracket, the bucket mount bracket coupled toeach of the pair of opposed slots.

9. The loader boom arm of example 8, further comprising a hollow torquetransfer tube, the torque transfer tube having a first tube end coupledto the third bore.

10. The loader boom arm of example 9, further comprising a second armassembly, the second arm assembly including a second third block coupledwithin an end of a fourth beam, and a second tube end of the torquetransfer tube is coupled to the second third block of the second armassembly.

11. The loader boom arm of example 1, wherein each of the blocksincludes at least one rib on a perimeter of the respective block toalign the block within the respective first end.

12. The loader boom arm of example 1, wherein each of the blocksincludes an insert that cooperates with an adhesive to couple each ofthe blocks within the respective first end.

13. The loader boom arm of example 1, wherein the first beam furthercomprises a hollow tube formed from a third lightweight materialdisposed over and coupled to the first beam.

14. The loader boom arm of example 2, wherein the first beam is formedto define a cylindrical interior channel for receiving the second block.

The terminology used herein is for the purpose of describing particularembodiments only and is not intended to be limiting of the disclosure.As used herein, the singular forms “a”, “an” and “the” are intended toinclude the plural forms as well, unless the context clearly indicatesotherwise. It will be further understood that the terms “comprises”and/or “comprising,” when used in this specification, specify thepresence of stated features, integers, steps, operations, elements,and/or components, but do not preclude the presence or addition of oneor more other features, integers, steps, operations, elements,components, and/or groups thereof.

The description of the present disclosure has been presented forpurposes of illustration and description, but is not intended to beexhaustive or limited to the disclosure in the form disclosed. Manymodifications and variations will be apparent to those of ordinary skillin the art without departing from the scope and spirit of thedisclosure. Explicitly referenced embodiments herein were chosen anddescribed to best explain the principles of the disclosure and theirpractical application, and to enable others of ordinary skill in the artto understand the disclosure and recognize many alternatives,modifications, and variations on the described example(s). Accordingly,various embodiments and implementations other than those explicitlydescribed are within the scope of the following claims.

What is claimed is:
 1. A hybrid loader boom arm assembly for a loaderwork vehicle, the loader boom arm comprising: an arm assembly thatincludes: a hollow first beam formed from a lightweight material; ablock formed from a second lightweight material, the block receivedwithin a first end of the first beam forming a vehicle mountingsubassembly; at least one first steel reinforcing plate coupled to andouter wall of the first beam; at least one connecting plate coupled tothe at least one first reinforcing plate, thereby disposing the firstreinforcing plate between the at least one connecting plate and theouter wall of the first beam at an opposite second end of the firstbeam.
 2. The loader boom arm of claim 1, wherein the first beam has athird end opposite the first end, and the third end receives a secondblock formed from the second lightweight material.
 3. The loader boomarm of claim 2, wherein the second block defines a cross- bore and theloader boom arm further comprises a sleeve, the sleeve coupled to thecross-bore and configured to couple the arm assembly to the loader workvehicle.
 4. The loader boom arm of claim 3, further comprising a pair oflock plates coupled to opposed ends of the sleeve to retain the sleevewithin the cross-bore at the third end of the first beam.
 5. The loaderboom arm of claim 4, further comprising at least one second steelreinforcing plate, the at least one second steel reinforcing platecoupled to the third end of the first beam and at least one of the pairof lock plates is adjacent to the at least one second steel reinforcingplate.
 6. The loader boom arm of claim 5, wherein the at least onesecond steel reinforcing plate extends from the first end of the firstbeam to the third end of the first beam.
 7. The loader boom arm of claim5, wherein the block has a second block end, the loader boom arm furthercomprising a hollow second beam formed from the lightweight material andat least one third steel reinforcing plate coupled to the second beam atthe second end, the second block end received within a second end of thesecond beam to couple the second beam to the first beam, the second beamhas a fourth end opposite the second end, and a third block formed fromthe second lightweight material is coupled within the fourth end.
 8. Theloader boom arm of claim 7, wherein the third block defines a pair ofopposed slots and a third bore, and the loader boom arm furthercomprises a bucket mount bracket, the bucket mount bracket coupled toeach of the pair of opposed slots.
 9. The loader boom arm of claim 8,further comprising a hollow torque transfer tube, the torque transfertube having a first tube end coupled to the third bore.
 10. The loaderboom arm of claim 9, further comprising a second arm assembly, thesecond arm assembly including a second third block coupled within an endof a fourth beam, and a second tube end of the torque transfer tube iscoupled to the second third block of the second arm assembly.
 11. Theloader boom arm of claim 1, wherein the block includes at least one ribdisposed on a perimeter of the block to align the block within the firstend of the first beam.
 12. The loader boom arm of claim 1, wherein eachof the blocks includes an insert that cooperates with an adhesive tocouple each of the blocks within the respective first end.
 13. Theloader boom arm of claim 1, wherein the first beam further comprises ahollow tube formed from a third lightweight material disposed over andcoupled to the first beam.
 14. The loader boom arm of claim 2, whereinthe first beam is formed to define a cylindrical interior channel forreceiving the second block.
 15. A hybrid loader boom arm assembly for aloader work vehicle, the loader boom arm comprising: an arm assemblythat includes: a hollow first beam formed from a lightweight material; ahollow second beam formed from the lightweight material; a block formedfrom a second lightweight material, the block received within a firstend of the first beam and received within a second end of the secondbeam, the block configured to couple the first beam to the second beamto form a vehicle mounting subassembly; at least one first steelreinforcing plate coupled to the first beam at the first end; at leastone second steel reinforcing plate coupled to the second beam at thesecond end; and at least one connecting plate coupled to the at leastone first reinforcing plate and the at least one second reinforcingplate, thereby disposing the first reinforcing plate between the atleast one connecting plate and the outer wall of the first beam at anopposite second end of the first beam.
 16. The loader boom arm of claim15, wherein the first beam has a third end opposite the first end, thethird end receives a second block formed from the second lightweightmaterial, the second block defines a cross-bore and the loader boom armfurther comprises a sleeve, the sleeve coupled to the cross-bore andconfigured to couple the arm assembly to the loader work vehicle. 17.The loader boom arm of claim 16, further comprising a pair of lockplates coupled to opposed ends of the sleeve to retain the sleeve withinthe cross-bore at the third end of the first beam.
 18. The loader boomarm of claim 15, wherein the second beam has a fourth end opposite thesecond end, and a third block formed from the second lightweightmaterial is coupled within the fourth end.
 19. The loader boom arm ofclaim 18, wherein the third block defines a pair of opposed slots and athird bore, and the loader boom arm further comprises a bucket mountbracket, the bucket mount bracket coupled to each of the pair of opposedslots.
 20. The loader boom arm of claim 19, further comprising a hollowtorque transfer tube and a second arm assembly, the torque transfer tubehaving a first tube end coupled to the third bore, the second armassembly including a second third block coupled within an end of afourth beam, and a second tube end of the torque transfer tube iscoupled to the second third block of the second arm assembly.